xserver_xorg-server: security bump to 1.16.3

- for a list of fixed CVE´s check
  http://lists.x.org/archives/xorg-announce/2014-December/002506.html


- added hash file

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>