clutter.modules: Update with the gdk-pixbuf split
clutter.modules: Update with the gdk-pixbuf split

Gdk-Pixbuf has been split back into its own module once again. This
means that Clutter doesn't have a build requirement on gtk+ any more.

djdeath/clutter-multithreaded,Distrotech/clutter,spatulasnout/clutter,dlespiau/clutter,collects/clutter,spatulasnout/clutter,Distrotech/clutter,djdeath/clutter,djdeath/clutter,GNOME/clutter,djdeath/clutter-android,djdeath/clutter,jigpu/clutter,djdeath/clutter-android,kerrickstaley/clutter-vala,spatulasnout/clutter,Distrotech/clutter,heysion/clutter-clone,heysion/clutter-clone,jigpu/clutter,djdeath/clutter,ebassi/clutter,djdeath/clutter-android,djdeath/clutter-multithreaded,nobled/clutter,rkudiyarov/clutter_osx,heysion/clutter-clone,Distrotech/clutter,djdeath/clutter-multithreaded,dlespiau/clutter,spatulasnout/clutter,collects/clutter,ebassi/clutter,collects/clutter,jigpu/clutter,djdeath/clutter-android,kerrickstaley/clutter-vala,dlespiau/clutter,djdeath/clutter-android,jigpu/clutter,kerrickstaley/clutter-vala,collects/clutter,rkudiyarov/clutter_osx,GNOME/clutter,GNOME/clutter,heysion/clutter-clone,rkudiyarov/clutter_osx,GNOME/clutter,ebassi/clutter,jigpu/clutter,GNOME/clutter,djdeath/clutter,heysion/clutter-clone,djdeath/clutter-multithreaded,spatulasnout/clutter,Distrotech/clutter,collects/clutter,ebassi/clutter,jigpu/clutter,djdeath/clutter,rkudiyarov/clutter_osx,Distrotech/clutter,nobled/clutter,ebassi/clutter,kerrickstaley/clutter-vala,nobled/clutter