xcompile: silence clang when referencing packed structs' members

clang complains that the access might be unaligned. Yes, we know. Yes,
that's exactly what we want. You have _one_ job.

Change-Id: I5400f50d8b5b462270c700f7ff90d9d517278e71
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/19659
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed