[pkg-apparmor] Bug#919775: Bug#919775: apparmor: AppArmor denies new mesa-related paths

[intrigeri]

Vincas Dargis:
> I'm sorry, but relevant update is in flight:
> https://gitlab.com/apparmor/apparmor/merge_requests/314
> mesa abstraction selection was incorrect decision.

OK. Merged upstream and cherry-picked into the packaging repo locally.
Will be part of next upload, presumably today! :)