Update backend_interface_update_test.cpp

Author: cccclai

runtime/backend/test/backend_interface_update_test.cpp

@@ -400,4 +400,4 @@ TEST_F(BackendUpdateTest, TestSetGetOption) {
   // Verify that the backend actually update the options
   ASSERT_EQ(stub_backend->last_options_size, 1);
   ASSERT_EQ(stub_backend->last_num_threads, new_num_threads);
-}
+}