xwayland: Use new DRI2 AuthMagic3
Pull in patch from http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?h=xwayland&id=1f2427f562f93efdd6447217f41ec378279d189c
Merge pull request #1 from runeksvendsen/xwayland

Small DRI2 API-usage cleanups