Update the Rust regex crate and get it building

Remove references to the simd-accel feature, which is no longer supported.
Update to the latest version, which is 1.3.7.
Remove the space from the wrapper-crate name, as cargo no longer permits the
space.

Author: ridiculousfish

src/rust/CMakeLists.txt

@@ -15,14 +15,6 @@ if(CMAKE_BUILD_TYPE MATCHES "^Release")
     list(APPEND CARGO_BUILD_OPT "--release")
 endif()
 
-if(${RUST_C_VERSION} MATCHES "nightly")
-    message("-- Found nightly. Use feature 'simd-accel': ON")
-
-    list(APPEND CARGO_BUILD_OPT "--features" "simd-accel")
-else()
-    message("-- Found stable. Use feature 'simd-accel': OFF")
-endif()
-
 add_custom_target(librregex ALL
     # create rust regex library
     COMMAND cargo build -v ${CARGO_BUILD_OPT}

src/rust/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "rust regex"
+name = "rust-regex"
 version = "0.1.0"
 authors = ["Daniel Schmidt"]
 
@@ -8,9 +8,8 @@ name = "rregex"
 crate-type = ["staticlib"]
 
 [dependencies]
-regex = { version = "0.2.1"}
+regex = "1.3.7"
 libc = "0.2.19"
 
 [features]
-simd-accel = ["regex/simd-accel"]