gstreamer: include codec for mp4 / QuickTime video

Change-Id: I9ace26b814ff9e5505cf729a1cb17ea49bc7b432
Reviewed-by: Samuli Piippo <samuli.piippo@digia.com>

recipes/images/b2qt-embedded-image.bb

@@ -52,6 +52,7 @@ GSTREAMER_EXTRA_INSTALL = "\
         gst-plugins-good-videofilter \
         gst-plugins-good-id3demux \
         gst-plugins-good-auparse \
+        gst-plugins-good-isomp4 \
         gst-plugins-ugly-rmdemux \
         gst-plugins-ugly-asf \
         gst-plugins-ugly-a52dec \