Linux patch 3.12.15.

git-svn-id: svn://anonsvn.gentoo.org/linux-patches@2714 00c4350b-4cf9-0310-8c1b-f3fed11d2be3
3.12-16 release

git-svn-id: svn://anonsvn.gentoo.org/linux-patches@2715 00c4350b-4cf9-0310-8c1b-f3fed11d2be3