Upgrade xserver-xorg-video-qxl for better performance in kvm/spice environments

Please ship the latest version of xserver-xorg-video-qxl;

Currently shipped version: 0.0.17-2+b1
Available version: 0.1.2 [1] [2]

The reason for an upgrade is a much (leaps and bounds) improved graphics performance in kvm/spice environment.

[1] http://cgit.freedesktop.org/xorg/driver/xf86-video-qxl/
[2] https://packages.debian.org/jessie/xserver-xorg-video-qxl

Related issues

• Related to #11500 (closed)

Original created by @sdsx4 on 8114 (Redmine)