[configure] Always execute the AM_CONDITIONAL call for X11_TESTS
[configure] Always execute the AM_CONDITIONAL call for X11_TESTS

Automake gets upset if an AM_CONDITIONAL call is itself conditionally
executed.

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