Add missing qmetatype.h include to qorganizerrecurrencerule.h

That header is needed because we use Q_DECLARE_METATYPE macro.

Change-Id: I3a9fc388d6793f047783e752e6750483d75b8277
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>

src/organizer/qorganizerrecurrencerule.h

@@ -43,6 +43,7 @@
 #define QORGANIZERRECURRENCERULE_H
 
 #include <QtCore/qdatetime.h>
+#include <QtCore/qmetatype.h>
 #include <QtCore/qset.h>
 #include <QtCore/qshareddata.h>