docs: Add missing symbols to the Clutter API reference
docs: Add missing symbols to the Clutter API reference

Distrotech/clutter,jigpu/clutter,jigpu/clutter,GNOME/clutter,Distrotech/clutter,jigpu/clutter,GNOME/clutter,Distrotech/clutter,jigpu/clutter,Distrotech/clutter,jigpu/clutter,GNOME/clutter,Distrotech/clutter,jigpu/clutter,GNOME/clutter,GNOME/clutter,Distrotech/clutter