xorg-server : apply patch by dsd to improve performance

Applies a patch to the xorg-server by dsd which improves performance on odroids. To get to a desktop i had to use this PKGBUILD for odroid-libgl archlinuxarm/PKGBUILDs#857 and i have it installed side-by-side with mesa-libgl.

Running glmark2-es2 with xorg-server from repo gave a score of 36

Running glmark2-es2 with xorg-server + dsd's patch package installed instead gave a score of 60