only let select xfree86 version and options if one of them was selected for
building.


git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@1368 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc

[*]    Enable Xinerama support globally


git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@1349 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc

git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@946 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc