radeon 6.12 stable branch

[Alex Deucher]

Since there have been a number of bug fixes as well as a lot of
experimental code in xf86-video-ati master since 6.12.2 was released,
I’ve created a 6.12 stable branch (6.12-branch) with all of the bug
and stability fixes since 6.12.2 was released.  This should be useful
for distros that just want to track bug and stability fixes since the
last major release.

http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/log/?h=6.12-branch

Alex