Add libGL as a dep for the xserver.
Add libGL as a dep for the xserver.

While the build isn't necessary for the X server, having the sources up to date
usually is.

tmzt/androix-util-modular,tmzt/androix-util-modular,freedesktop-unofficial-mirror/xorg__util__modular,freedesktop-unofficial-mirror/xorg__util__modular,freedesktop-unofficial-mirror/xorg__util__modular