package/x11r7/xserver_xorg-server: bump version to 1.17.0

- remove patches, all were applied upstream
- add support for libglamor, needed by package/x11r7/xdriver_xf86-video-ati

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