Fix widget dependencies for multimediawidget tests and examples.

Change-Id: I9c7600ce2cf7980f923ba038ef122b49add24c37
Reviewed-on: http://codereview.qt-project.org/5286
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

examples/declarative-radio/main.cpp

@@ -38,7 +38,7 @@
  **
  ****************************************************************************/
 
-#include <QApplication>
+#include <QGuiApplication>
 
 #include <qdeclarative.h>
 #include <qsgview.h>
@@ -46,7 +46,7 @@
 
 int main(int argc, char ** argv)
 {
-    QApplication app(argc, argv);
+    QGuiApplication app(argc, argv);
 
     QSGView view;