Features:
* xf86-video-intel git snapshots using commit ids to generate
.tar.xz file similar to what FreeBSD ports now does.
Fixed snapshots used to debug showstopping FreeBSD and DragonFly
bugs so that glxgears now functions properly.
* Merged patches from FreeBSD ports and DragonFly dports.
Can properly load i915kms module on FreeBSD.
* Developed further patches for DragonFly for kgem.c so that
field in 2nd version of mmap struct is always initialized.
* Added option for FreeBSD to prefer uxa over sna.
* Added --enable-debug option.
1b78d4131f