Disable qmlscene and qmlplugindump when doing static builds

Both of these tools rely on the ability to load plugins in order to function.
QmlScene in particular can theoretically be used with just "QtQml" imports
and QObjects, but that's not very useful for the _scene_ type of applications
qmlscene is intended for ;-). And in a static build it can't load QtQuick.

Task-number: QTBUG-39003
Change-Id: I0d4328dc4eb5c4e3153668e65a12f8eb3757f660
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
Dump all received messages if tst_QQmlProfilerService fails

Without all the context we can't really tell what happened.

Task-number: QTBUG-39169
Change-Id: Ic5192498440a0d55c279549243dfce65f8168317
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>