mesa: Use gcc on aarch64
mesa: Use gcc on aarch64

clang master/13.x has started segfaulting while building mesa, until it
is fixed upstream lets switch to using gcc for mesa

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/meta-clang,kraj/meta-clang,kraj/meta-clang