[CFT] Mesa 18.2.0 update (mesa-libs, mesa-dri, libosmesa, clover)

[Samy Mahmoudi]

> Did mpv --hwdec=vaapi work fine with Mesa 18.1.*?

I just tried on 11.2-RELEASE-p4 with mesa-*-{18.1.4|18.1.9} and both
--hwdec=auto and --hwdec=vaapi produce the same results as with 18.2.0:

[vo/gpu/vaapi-egl] vaAcquireSurfaceHandle() failed (invalid VASurfaceID)
[vo/gpu/vaapi-egl] vaAcquireBufferHandle() failed (invalid VABufferID)


Similarily, "MOZ_ACCELERATED=1 MOZ_WEBRENDER=1 firefox" is not better with
18.1.*: the glitches observerd with 18.2.0 were already there with 18.1.*.

So it seems to me these were not regressions but problems already present
with 18.1.*.