project-lakitu: unmask audit flag and use it for building PAM

Unmask audit flag in project-lakitu's ARM64 profile. It's masked
on all non-x86 architectures in portage-stable, supposedly because
it wasn't tested.

Use audit flag for system-libs/pam dependency of cloud-audit-config

BUG=b/177594507
TEST=presubmit
RELEASE_NOTE=None

Change-Id: Ic04c1b65479fd3661e55f6845fb0ba941be168f4
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/10840
Reviewed-by: Oleksandr Tymoshenko <ovt@google.com>
Tested-by: Oleksandr Tymoshenko <ovt@google.com>
3 files changed