Revert "Remove XRandrBrightness"
Apparently there's still graphics cards that rely on this :'(
This was the only real change in this cycle, so just reverting it is safe,
albeit technically being a dependency change.
BUG: 399018
CCMAIL: kde-distro-packagers@kde.org
This reverts commit 7e29869329184d9e2bae6019939e2ecb0eceac0d.