Work around Q_DECLARE_METATYPE(QFileInfo) being added to QtCore

Change-Id: Ic83e5fdaa7ef289f40cbeb4633a75d93d38c0bdb
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

tools/qmlscene/main.cpp

@@ -171,7 +171,9 @@ struct Options
 };
 
 #if defined(QMLSCENE_BUNDLE)
+#ifndef QT_QFILEINFO_METATYPE_DEFINED
 Q_DECLARE_METATYPE(QFileInfo);
+#endif
 QFileInfoList findQmlFiles(const QString &dirName)
 {
     QDir dir(dirName);