xorg-xserver: update to 1.19.5

xorg-xserver: update to 1.19.5

Remove patches that are included in 1.19.4

[ANNOUNCE] xorg-server 1.19.4
https://lists.x.org/archives/xorg-devel/2017-October/054839.html

xkb: Handle xkb formated string output safely (CVE-2017-13723)
Xext/shm: Validate shmseg resource id (CVE-2017-13721)

[ANNOUNCE] xorg-server 1.19.5
https://lists.x.org/archives/xorg-announce/2017-October/002814.html
One regression fix since 1.19.4 (mea culpa), and fixes for CVEs 2017-
12176 through 2017-12187. C is a terrible language, please stop writing
code in it.

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>