clutter.modules: Add a gtk2 module for gtk+ 2.x
clutter.modules: Add a gtk2 module for gtk+ 2.x

Mx (and others) depend on gtk+ 2.x, and not on gtk+ 3.x.

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