message: When the proto file passed using --config has errors, printing the command
  line usage isn't helpful, so suppress it. Likewise, if tfcompile is called
  without arguments, just print an error (and point to --help), instead of
  printing the whole usage.
diff: @@ -82,12 +82,10 @@ int main(int argc, char** argv) {
  tensorflow::port::InitMain(usage.c_str(), &argc, &argv);
  QCHECK(argc == 1) << "\nERROR: This command does not take any arguments "
  - "other than flags\n\n"
  - << usage;
  + "other than flags. See --help.\n\n";
  tensorflow::Status status = tensorflow::tfcompile::Main(flags);
  if (status.code() == tensorflow::error::INVALID_ARGUMENT) {
  - std::cerr << "INVALID ARGUMENTS: " << status.error_message() << "\n\n"
  - << usage;
  + std::cerr << "INVALID ARGUMENTS: " << status.error_message() << "\n\n";
  return 1;
  } else {
  TF_QCHECK_OK(status);
  