Fix littlevgl link error issues (bytecodealliance#1006)

The littlevgl library had changed its name and domain to [LVGL](https://lvgl.io).
See https://blog.lvgl.io/2020-06-01/announcement
We change some names and links accordingly.

Also remove the cloning for tlsf library as it isn't used now.

ATTRIBUTIONS.md

@@ -5,7 +5,7 @@ WAMR project reused some components from other open source project:
 - **cJson**: used in the host_tool for remotely managing wasm applications
 - **contiki-ng**: for the coap protocol implementation
 - **freebsd libm**: used in core/shared/platform/alios/bh_math.c
-- **littlevgl**: for the gui samples and wrapped the wasm graphic layer
+- **LVGL**: for the gui samples and wrapped the wasm graphic layer
 - **llvm**: for the AOT/JIT compilation
 - **wasm-c-api**: to implement the C-APIs of wasm. using headers and sameples
 - **wasmtime**: for the wasi libc implementation
@@ -19,7 +19,7 @@ The WAMR fast interpreter is a clean room development. We would acknowledge the
 | cjson | 1.7.10 | 1.7.14 | https://github.com/DaveGamble/cJSON | https://www.cvedetails.com/vendor/19164/Cjson-Project.html |
 | contiki-ng (er-coap) | unspecified | 3.0 | https://github.com/contiki-os/contiki | https://www.cvedetails.com/vendor/16528/Contiki-os.html |
 | freebsd libm | unspecified | 13.0 | https://www.freebsd.org/ | https://www.cvedetails.com/vendor/6/Freebsd.html |
-| littlevgl | 6.0.1 | 7.11.0 | https://lvgl.io/ | |
+| LVGL | 6.0.1 | 7.11.0 | https://lvgl.io/ | |
 | llvm | 11.0.1 | 12.0.0 | https://llvm.org | https://www.cvedetails.com/vendor/13260/Llvm.html |
 | wasm-c-api | ac9b509f4df86e40e56e9b01f3f49afab0100037 | c9d31284651b975f05ac27cee0bab1377560b87e | https://github.com/WebAssembly/wasm-c-api | |
 | wasmtime | unspecified | v0.26.0 | https://github.com/bytecodealliance/wasmtime | |
@@ -40,11 +40,11 @@ The WAMR fast interpreter is a clean room development. We would acknowledge the
 
 [COPYRIGHT](./core/shared/platform/common/math/COPYRIGHT)
 
-### littlevgl
+### LVGL
 
-[LICENCE](./samples/littlevgl/LICENCE.txt)
+[LICENSE](./samples/littlevgl/LICENCE.txt)
 
-[LICENSE](./core/deps/lvgl/LICENCE.txt)
+[LICENSE](./core/app-framework/wgl/app/wa-inc/lvgl/LICENCE.txt)
 
 ### llvm
 

README.md

@@ -146,8 +146,8 @@ The WAMR [samples](./samples) integrate the iwasm VM core, application manager a
 
 - [**basic**](./samples/basic): Demonstrating how to use runtime exposed API's to call WASM functions, how to register native functions and call them, and how to call WASM function from native function.
 - **[simple](./samples/simple/README.md)**: The runtime is integrated with most of the WAMR APP libraries, and a few WASM applications are provided for testing the WAMR APP API set. It uses **built-in libc** and executes apps in **interpreter** mode by default.
-- **[littlevgl](./samples/littlevgl/README.md)**: Demonstrating the graphic user interface application usage on WAMR. The whole [LittleVGL](https://github.com/lvgl/) 2D user graphic library and the UI application are built into WASM application.  It uses **WASI libc** and executes apps in **AOT mode** by default.
-- **[gui](./samples/gui/README.md)**: Move the [LittleVGL](https://github.com/lvgl/) library into the runtime and define a WASM application interface by wrapping the littlevgl API. It uses **WASI libc** and executes apps in **interpreter** mode by default.
+- **[littlevgl](./samples/littlevgl/README.md)**: Demonstrating the graphic user interface application usage on WAMR. The whole [LVGL](https://github.com/lvgl/lvgl) 2D user graphic library and the UI application are built into WASM application.  It uses **WASI libc** and executes apps in **AOT mode** by default.
+- **[gui](./samples/gui/README.md)**: Move the [LVGL](https://github.com/lvgl/lvgl) library into the runtime and define a WASM application interface by wrapping the littlevgl API. It uses **WASI libc** and executes apps in **interpreter** mode by default.
 - **[multi-thread](./samples/multi-thread/)**: Demonstrating how to run wasm application which creates multiple threads to execute wasm functions concurrently, and uses mutex/cond by calling pthread related API's.
 - **[spawn-thread](./samples/spawn-thread)**: Demonstrating how to execute wasm functions of the same wasm application concurrently, in threads created by host embedder or runtime, but not the wasm application itself.
 - **[multi-module](./samples/multi-module)**: Demonstrating the [multiple modules as dependencies](./doc/multi_module.md) feature which implements the [load-time dynamic linking](https://webassembly.org/docs/dynamic-linking/).

core/deps/download.sh

@@ -6,23 +6,15 @@ cd ${DEPS_ROOT}
 
 if [ ! -d "lvgl" ]; then
         echo "git pull lvgl..."
-        git clone https://github.com/littlevgl/lvgl.git --branch v6.0.1
+        git clone https://github.com/lvgl/lvgl.git --branch v6.0.1
         [ $? -eq 0 ] || exit $?
 
         ../app-framework/wgl/app/prepare_headers.sh
 fi
 if [ ! -d "lv_drivers" ]; then
         echo "git pull lv_drivers..."
-        git clone https://github.com/littlevgl/lv_drivers.git --branch v6.0.1
+        git clone https://github.com/lvgl/lv_drivers.git --branch v6.0.1
         [ $? -eq 0 ] || exit $?
 fi
 
-if [ ! -d "tlsf" ]; then
-    echo "git pull tlsf..."
-    git clone https://github.com/mattconte/tlsf
-    [ $? -eq 0 ] || exit $?
-    #cd ${WAMR_DIR}/core/shared/mem-alloc
-fi
-
-
 exit 0

doc/wamr_api.md

@@ -283,7 +283,7 @@ void on_destroy()
 
 ## GUI API
 
-The API's is listed in header file ```core/app-framework/wgl/app/wa-inc/wgl.h``` which is implemented based on open source 2D graphic library [LittlevGL](https://docs.littlevgl.com/en/html/index.html).
+The API's is listed in header file ```core/app-framework/wgl/app/wa-inc/wgl.h``` which is implemented based on open source 2D graphic library [LVGL](https://docs.lvgl.io/master/index.html).
 
 ``` C
 static void btn_event_cb(wgl_obj_t btn, wgl_event_t event);

samples/littlevgl/build.sh

@@ -34,7 +34,7 @@ mkdir ${OUT_DIR}
 cd ${BUILD_DIR}
 if [ ! -d "lvgl" ]; then
         echo "starting download lvgl for v5.3 ..."
-        git clone https://github.com/littlevgl/lvgl.git --branch v5.3
+        git clone https://github.com/lvgl/lvgl.git --branch v5.3
         if [ $? != 0 ];then
             echo "download lvgl repo failed: $?\n"
             exit 2

samples/littlevgl/vgl-native-ui-app/CMakeLists.txt.in

@@ -7,7 +7,7 @@ project(lvgl_download NONE)
 
 include(ExternalProject)
 ExternalProject_Add(${lv_name}
-    GIT_REPOSITORY https://github.com/littlevgl/lvgl.git
+    GIT_REPOSITORY https://github.com/lvgl/lvgl.git
     GIT_TAG        v5.3
     BINARY_DIR     ""
     SOURCE_DIR            "${CMAKE_CURRENT_BINARY_DIR}/../build/lvgl"

samples/simple/build.sh

@@ -95,10 +95,6 @@ mkdir ${OUT_DIR}
 mkdir ${OUT_DIR}/wasm-apps
 
 cd ${WAMR_DIR}/core/shared/mem-alloc
-if [ ! -d "tlsf" ]; then
-    git clone https://github.com/mattconte/tlsf
-fi
-
 
 PROFILE="simple-$PROFILE"