Fix up some QOpenGL includes

OpenGL-specific code here and there relied on qopenglfunctions.h pulled in
from some unrelated place. This was cleaned up in some previous commit so
add the necessary includes.

Change-Id: I9d9ff6c5faf9fc9d59d8e1cfd4fab05ebff4b4e0
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>

src/quick/items/qquickframebufferobject.cpp

@@ -40,7 +40,7 @@
 #include "qquickframebufferobject.h"
 
 #include <QtGui/QOpenGLFramebufferObject>
-
+#include <QtGui/QOpenGLFunctions>
 #include <private/qquickitem_p.h>
 
 #include <QSGSimpleTextureNode>

src/quick/items/qquickopenglshadereffectnode.cpp

@@ -45,6 +45,7 @@
 #include <QtQuick/private/qsgshadersourcebuilder_p.h>
 #include <QtQuick/private/qsgtexture_p.h>
 #include <QtCore/qmutex.h>
+#include <QtGui/qopenglfunctions.h>
 
 QT_BEGIN_NAMESPACE