message: Used fixed emcc version on Linux
diff: @@ -2,6 +2,7 @@ WD=`pwd`
  git clone https://github.com/emscripten-core/emsdk.git && \
  cd emsdk
  git pull && \
  +git checkout 2.0.4 && \
  ./emsdk install sdk-1.39.11-64bit && \
  ./emsdk activate sdk-1.39.11-64bit && \
  source ./emsdk_env.sh
  