message: [Linux] Override the default QPA platform plugin
  Issue ##14061
diff: static int inner_main(int argc, char** argv)
  {
  +#ifdef Q_OS_LINUX
  + // override default Qt platform plugin
  + qputenv("QT_QPA_PLATFORM", "offscreen");
  +#endif
  +
  QApplication app(argc, argv);
  app.setWindowIcon(QIcon(":/phantomjs-icon.png"));
  