Make multimedia QML types available for the 5.3 import version.

At least one type needs to be registered with the 5.3 version number to
make it known to the QML engine.

Change-Id: Iacfe62650b4194fbb89135fef7cb148309227ce2
Reviewed-by: Alan Alpert (Personal) <416365416c@gmail.com>

src/imports/multimedia/multimedia.cpp

@@ -95,6 +95,11 @@ public:
         qmlRegisterUncreatableType<QDeclarativeCameraImageProcessing>(uri, 5, 0, "CameraImageProcessing",
                                 trUtf8("CameraImageProcessing is provided by Camera"));
 
+        // Make types available for the 5.3 version
+        // Adding "import QtMultimedia 5.3" in QML will fail unless at least one type is registered
+        // for that version.
+        qmlRegisterType<QSoundEffect>(uri, 5, 3, "SoundEffect");
+
         qmlRegisterType<QDeclarativeMediaMetaData>();
     }