build: Add CPPFLAGS for the g-ir-scanner command line
build: Add CPPFLAGS for the g-ir-scanner command line

When I moved all CPP flags to AM_CPPFLAGS from the INCLUDES directive
I forgot that g-ir-scanner needs those defines as well.

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