build: Release 1.2.0
build: Release 1.2.0

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