Don't add GL libs for EGL X11 backend
Don't add GL libs for EGL X11 backend

Configure uses the GL .pc file to add GL includes and libs for the eglx
backend.

http://bugzilla.openedhand.com/show_bug.cgi?id=2104

Signed-off-by: Emmanuele Bassi <049ee2061f71220e5aaf33f5be422fc2a2b06a44@linux.intel.com>

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