[browser][wasm] Fix provision-wasm build error (#49863)

kjpou1 · web-flow · commit 43e5ae18e37c · 2021-03-19T12:48:26.000-05:00
```
cd emsdk &amp;&amp; ./emsdk install `cat emscripten-version.txt`
cat: emscripten-version.txt: No such file or directory
```
diff --git a/src/mono/wasm/Makefile b/src/mono/wasm/Makefile
@@ -33,7 +33,7 @@ all: build-native icu-files source-files header-files
 #  If EMSDK_PATH is not set by the caller, download and setup a local emsdk install.
 #
 
-EMSCRIPTEN_VERSION=`cat emscripten-version.txt`
+EMSCRIPTEN_VERSION := $(shell cat $(TOP)/src/mono/wasm/emscripten-version.txt)
 EMSDK_LOCAL_PATH=emsdk
 EMCC=source $(EMSDK_PATH)/emsdk_env.sh 2>/dev/null && emcc
 

Original file line number	Diff line number	Diff line change
`@@ -33,7 +33,7 @@ all: build-native icu-files source-files header-files`
`33`	`33`	`# If EMSDK_PATH is not set by the caller, download and setup a local emsdk install.`
`34`	`34`	`#`
`35`	`35`
`36`		-EMSCRIPTEN_VERSION=`cat emscripten-version.txt`
	`36`	`+EMSCRIPTEN_VERSION := $(shell cat $(TOP)/src/mono/wasm/emscripten-version.txt)`
`37`	`37`	`EMSDK_LOCAL_PATH=emsdk`
`38`	`38`	`EMCC=source $(EMSDK_PATH)/emsdk_env.sh 2>/dev/null && emcc`
`39`	`39`