build: Fix include path for Cally's introspection
build: Fix include path for Cally's introspection

The introspection scanner does not include '.' by default, so it was
always using the installed copy of Clutter-1.0.gir. Which obviously
wouldn't work if we didn't have one.

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