update native api test

Author: nichcode

tests/native_integration_test.c

@@ -405,6 +405,9 @@ bool nativeIntegrationTest()
     getWindowTitle(&windowInfo);
     palLog(nullptr, "Window title: %s", s_TitleBuffer);
 
+    // using native API like wl_proxy_set_user_data, XContext and 
+    // SetWindowLongPtr(GWLP_USERDATA) can be used freely
+
     bool running = true;
     while (running) {
         // update the video system to push video events