project-lakitu: sys-process/audit: apply the initial COS modification

When sys-process/audit was first created in COS by commit f56a9bfa5b75
("add audit tools in sys-process/audit") in
src/private-overlays/overlay-lakitu-private repository, its ebuild
file was different from the upstream Gentoo's ebuild file. This commit
applies those differences to 3.0.2

BUG=b/186856398
TEST=See the last commit in this series.
RELEASE_NOTE=None

Change-Id: I4e0788979962a8fe53f452b93dff979586a20b95
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/19800
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
5 files changed