xorg-server: Changes to 'ubuntu-xenial'

[Robert Ancell]

New branch 'ubuntu-xenial' available with the following commits:
commit 242ec8b9121e7a4fbbed596c38b4d4f7612f202e
Author: Robert Ancell <robert.anc...@canonical.com>
Date:   Fri Apr 29 16:07:25 2016 +0200

    release to xenial