server: remove unnecessary dependency between surfaces and Glz drawables
server: remove unnecessary dependency between surfaces and Glz drawables

Fixes freedesktop bug #28568

fgouget/spice,fgouget/spice,virtualAMP/spiceplay,elmarco/spice,alon/spice-server,elmarco/spice,fgouget/spice,freedesktop-unofficial-mirror/spice__spice,Fantu/spice,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,dezelin/spice,dezelin/spice,elmarco/spice,Fantu/spice,freedesktop-unofficial-mirror/spice__spice,dezelin/spice,ya-mouse/spice,fgouget/spice,dezelin/spice,elmarco/spice,mathslinux/spice,virtualAMP/spiceplay,dezelin/spice,Fantu/spice,mathslinux/spice,alon/spice-server,SPICE/spice,virtualAMP/spiceplay,ya-mouse/spice,ya-mouse/spice,SPICE/spice,SPICE/spice,alon/spice-server,mathslinux/spice,alon/spice-server,Fantu/spice,freedesktop-unofficial-mirror/spice__spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,mathslinux/spice,virtualAMP/spiceplay,mathslinux/spice