mesa*: Update to 21.1.4

[manu]

Summary

• swrast is only a gallium driver now.
• Bump needed llvm to 12
• libclc is still a llvm10, moving to >10 needs to change from where we pick libclc as its now part of llvm

[val_packett.cool]

libclc is still a llvm10, moving to >10 needs to change from where we pick libclc as its now part of llvm

See also https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249620 (I've only bumped to llvm11 there, but 11 to 12 should be easy now)

[manu]

In D31165#701782, @greg_unrelenting.technology wrote:

libclc is still a llvm10, moving to >10 needs to change from where we pick libclc as its now part of llvm

See also https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249620 (I've only bumped to llvm11 there, but 11 to 12 should be easy now)

Thanks, I'll have a better look but at first glance that looks ok.

[manu]

21.1.5 is out now (https://gitlab.freedesktop.org/mesa/mesa/-/commit/4a4f07d6a148141bea02a3a875e938ab639fe847)
That shouldn't cause problems so I'll probably update this review this week.