Removed module names from #include directives.

Getting the #include directives ready for Qt5. This includes the
new-project wizards.

Change-Id: Ia9261f1e8faec06b9285b694d2b7e9a095978d2b
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

tests/auto/extensionsystem/pluginmanager/circularplugins/plugin2/plugin2.cpp

@@ -32,7 +32,7 @@
 
 #include "plugin2.h"
 
-#include <QtCore/qplugin.h>
+#include <qplugin.h>
 
 using namespace Plugin2;