ati 19.1.0
Drop patch 0001-dri3-Always-flush-glamor-before-sharing-pixmap-stora.patch,
merged upstream.
Add patches 0001-Handle-NULL-fb_ptr-in-pixmap_get_fb.patch &
0002-Don-t-crash-X-server-if-GPU-acceleration-is-not-avai.patch from
upstream Git master, fixing crashes with ShadowFB.