Most CI tests are currently running on LLVM 11 (released over 2 years
ago), which predates some of the GPUs we have in CI and prevents
testing RADV's LLVM backend.
LLVM 13 is known to work for RADV, released almost 8 months ago, and
is already available in most distributions. Fedora 36 is even already
on LLVM 14.
So this commit updates x86 testing on llvm 13.
v2:
- store the llvm apt repo key locally (Michel Dänzer)
Signed-off-by: Martin Roukala (né Peres) <martin.roukala@mupuf.org>
Acked-by: Timur Kristóf <timur.kristof@gmail.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17188>
4d7c11aa8d