build: Clean up the configuration summary
build: Clean up the configuration summary

List the input backends, and remove the EGL backend options.

djdeath/clutter,GNOME/clutter,jigpu/clutter,heysion/clutter-clone,heysion/clutter-clone,GNOME/clutter,GNOME/clutter,Distrotech/clutter,jigpu/clutter,djdeath/clutter,djdeath/clutter-android,heysion/clutter-clone,djdeath/clutter-android,djdeath/clutter,heysion/clutter-clone,collects/clutter,djdeath/clutter-multithreaded,kerrickstaley/clutter-vala,djdeath/clutter-multithreaded,kerrickstaley/clutter-vala,GNOME/clutter,Distrotech/clutter,djdeath/clutter-multithreaded,kerrickstaley/clutter-vala,djdeath/clutter-multithreaded,djdeath/clutter,collects/clutter,jigpu/clutter,djdeath/clutter-android,ebassi/clutter,collects/clutter,ebassi/clutter,Distrotech/clutter,ebassi/clutter,Distrotech/clutter,collects/clutter,Distrotech/clutter,djdeath/clutter,jigpu/clutter,heysion/clutter-clone,ebassi/clutter,jigpu/clutter,collects/clutter,djdeath/clutter-android,Distrotech/clutter,djdeath/clutter,ebassi/clutter,GNOME/clutter,djdeath/clutter-android,jigpu/clutter,kerrickstaley/clutter-vala