[build] Use top_srcdir instead of relative paths
[build] Use top_srcdir instead of relative paths

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