[RFC] Mesa package updates for experimental

[Jon Severinsson <jon@severinsson.net>]

I recently made a local package of mesa 8.0.4+git for some of my systems,
and while most of the patches I included was backports, I included some
additional packaging updates applicable to debian-experimental branch.
In the hope they may be of use to you, I've prepared this series for
your consideration.

Best regards
Jon Severinsson