message: Add --announce_rc into bazelrc file
  This will help understand and debug builds.
diff: @@ -101,6 +101,9 @@ build --spawn_strategy=standalone
  build --strategy=Genrule=standalone
  build -c opt
  +# Make Bazel print out all options from rc files.
  +build --announce_rc
  +
  # Other build flags.
  build --define=grpc_no_ares=true
  