[Audio] Add CLUTTER_GST_NOTE() traces
[Audio] Add CLUTTER_GST_NOTE() traces

ClutterGstAudio has been left behing a bit. Start with adding debugging
traces.

ystreet/clutter-gst,skinkie/clutter-gst,skinkie/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst,GNOME/clutter-gst,lubosz/clutter-gst,lubosz/clutter-gst,skinkie/clutter-gst,GNOME/clutter-gst,ystreet/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst,lubosz/clutter-gst