message: Populate custom name in registration.
diff: @@ -34,6 +34,7 @@ void MutableOpResolver::AddBuiltin(tflite::BuiltinOperator op,
  int min_version, int max_version) {
  for (int version = min_version; version <= max_version; ++version) {
  TfLiteRegistration new_registration = *registration;
  + new_registration.custom_name = nullptr;
  new_registration.builtin_code = op;
  new_registration.version = version;
  auto op_key = std::make_pair(op, version);
  @@ -47,6 +48,7 @@ void MutableOpResolver::AddCustom(const char* name,
  for (int version = min_version; version <= max_version; ++version) {
  TfLiteRegistration new_registration = *registration;
  new_registration.builtin_code = BuiltinOperator_CUSTOM;
  + new_registration.custom_name = name;
  new_registration.version = version;
  auto op_key = std::make_pair(name, version);
  custom_ops_[op_key] = new_registration;
  