message: Update clang to newer version.
diff: @@ -47,7 +47,7 @@ RUN apt-get update && apt-get install -y \
  rm -rf /var/lib/apt/lists/*
  # Copy and run the install scripts.
  -ENV CLANG_VERSION="r373795"
  +ENV CLANG_VERSION="ra21beccea2020f950845cbb68db663d0737e174c"
  COPY install/*.sh /install/
  ARG DEBIAN_FRONTEND=noninteractive
  RUN /install/install_bootstrap_deb_packages.sh
  