mesa: Changes to 'ubuntu-vivid'

[Timo Aaltonen <tjaalton@moszumanska.debian.org>]

New branch 'ubuntu-vivid' available with the following commits:
commit 5a4eca47d7a1310d3e459d9ab55b893dec0f3b00
Author: Timo Aaltonen <tjaalton@debian.org>
Date:   Fri Jul 10 14:08:51 2015 +0300

    update the changelog

commit 83feb002d91de08d9959c3309a4547e281a9bcae
Merge: d3c1515 c42a748
Author: Timo Aaltonen <tjaalton@debian.org>
Date:   Fri Jul 10 14:08:15 2015 +0300

    Merge branch 'ubuntu' into ubuntu-vivid

commit d3c15151b86d0f2062ca624ab3d2a9c979d0a495
Author: Timo Aaltonen <tjaalton@debian.org>
Date:   Wed Jul 8 11:36:38 2015 +0300

    backport to vivid