Same for emscripten.

Author: Alexhuszagh

docker/Dockerfile.asmjs-unknown-emscripten

@@ -20,4 +20,4 @@ ENV CROSS_SYSROOT=/emsdk/upstream/emscripten/cache/sysroot
 ENV CROSS_TARGET_RUNNER="node"
 ENV CARGO_TARGET_ASMJS_UNKNOWN_EMSCRIPTEN_RUNNER="$CROSS_TARGET_RUNNER" \
     BINDGEN_EXTRA_CLANG_ARGS_asmjs_unknown_emscripten="--sysroot=$CROSS_SYSROOT" \
-    CMAKE_TOOLCHAIN_FILE=/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
+    CMAKE_TOOLCHAIN_FILE_asmjs_unknown_emscripten=/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake

docker/Dockerfile.wasm32-unknown-emscripten

@@ -20,4 +20,4 @@ ENV CROSS_SYSROOT=/emsdk/upstream/emscripten/cache/sysroot
 ENV CROSS_TARGET_RUNNER="node"
 ENV CARGO_TARGET_WASM32_UNKNOWN_EMSCRIPTEN_RUNNER="$CROSS_TARGET_RUNNER" \
     BINDGEN_EXTRA_CLANG_ARGS_wasm32_unknown_emscripten="--sysroot=$CROSS_SYSROOT" \
-    CMAKE_TOOLCHAIN_FILE=/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
+    CMAKE_TOOLCHAIN_FILE_wasm32_unknown_emscripten=/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake