Deploy xcbglintegrations plugin when using libQt5Gui, closes probonopd#30

Author: tsteven4

tools/linuxdeployqt/shared.cpp

@@ -1230,6 +1230,7 @@ void deployPlugins(const AppDirInfo &appDirInfo, const QString &pluginSourcePath
 
     // Platform OpenGL context
     if ((containsHowOften(deploymentInfo.deployedLibraries, "libQt5OpenGL"))
+		    or (containsHowOften(deploymentInfo.deployedLibraries, "libQt5Gui"))
 		    or (containsHowOften(deploymentInfo.deployedLibraries, "libQt5XcbQpa"))
 		    or (containsHowOften(deploymentInfo.deployedLibraries, "libxcb-glx"))) {
         QStringList xcbglintegrationPlugins = QDir(pluginSourcePath +  QStringLiteral("/xcbglintegrations")).entryList(QStringList() << QStringLiteral("*.so"));