fix(cxx_indexer): allow protobuf metadata in .stubby.h files (#4004)
fix(cxx_indexer): allow protobuf metadata in .stubby.h files (#4004)


kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe