[Beignet] beignet and LLVM 4

[Rebecca N. Palmer]

Debian plans to remove LLVM 3.8 and 3.9, retaining 4.0 and 5.0 [0].

beignet 1.3.1 (currently in Debian) doesn't build with LLVM 4.0+, but 
beignet git master does.

Fedora tried applying the 4.0-support patches to beignet 1.3.1, but 
found that this made several applications crash, and are now using a git 
snapshot [1-2].

Is such a snapshot also likely to be the best solution for Debian 
beignet, and if so, should it be 'same commit as Fedora' (36f6a8b), 
'current master', or some other point?

[0] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=873403 Anyone can 
comment there, but be aware that Debian does _not_ spam-protect email 
addresses.
[1] https://koji.fedoraproject.org/koji/buildinfo?buildID=943802
[2] 
https://bugzilla.redhat.com/buglist.cgi?component=beignet&product=Fedora 
, several towards the end.