message: iOS Metal delegate: Status::error_message() -> message()
diff: @@ -277,11 +277,11 @@ Status Compile(const GraphFloat32& graph, const RuntimeOptions& options,
  auto primary_status =
  RegisterPrimaryOps(graph, node, inputs, outputs, options, &tasks);
  if (!primary_status.ok()) {
  - return UnimplementedError(absl::Substitute(
  - "Unsupported op type: $0; custom registry error: "
  + return UnimplementedError(
  + absl::Substitute("Unsupported op type: $0; custom registry error: "
  "$1; primary registry error: $2;",
  - node->operation.type, custom_status.error_message(),
  - primary_status.error_message()));
  + node->operation.type, custom_status.message(),
  + primary_status.message()));
  }
  }
  compiled_model->insert(compiled_model->end(), tasks.begin(), tasks.end());
  