llvm: allow arm64

Currently, all architectures but the i386/x86 ones are excluded
from the LLVM backend, mainly because the lack of testing.

Since I can test it now, allow arm64/aarch64 too.

Note: this patch is somehow incomplete because the layout is not set
      but it's not clear what exactly the layout is needed for and at
      least it allows to run the testsuite on this architecture.

Signed-off-by: Luc Van Oostenryck <lucvoo@kernel.org>
1 file changed