message: Swich Ubuntu docker to 10.0 by default and fix removal of temporary files
diff: @@ -42,14 +42,14 @@ WORKDIR /usr/local/src/ispc
  # Build Clang with all required patches.
  # Pass required LLVM_VERSION with --build-arg LLVM_VERSION=<version>.
  -# By default 8.0 is used.
  +# By default 10.0 is used.
  # Note self-build options, it's required to build clang and ispc with the same compiler,
  # i.e. if clang was built by gcc, you may need to use gcc to build ispc (i.e. run "make gcc"),
  # or better do clang selfbuild and use it for ispc build as well (i.e. just "make").
  # "rm" are just to keep docker image small.
  -ARG LLVM_VERSION=8.0
  +ARG LLVM_VERSION=10.0
  RUN ./alloy.py -b --version=$LLVM_VERSION --selfbuild --git && \
  - rm -rf $LLVM_HOME/build-$LLVM_VERSION $LLVM_HOME/llvm-$LLVM_VERSION $LLVM_HOME/bin-$LLVM_VERSION_temp $LLVM_HOME/build-$LLVM_VERSION_temp
  + rm -rf $LLVM_HOME/build-$LLVM_VERSION $LLVM_HOME/llvm-$LLVM_VERSION $LLVM_HOME/bin-"$LLVM_VERSION"_temp $LLVM_HOME/build-"$LLVM_VERSION"_temp
  ENV PATH=$LLVM_HOME/bin-$LLVM_VERSION/bin:$PATH
  