project-lakitu: sys-apps/shadow: set default umask to 027

This commit re-applies commit 11db1cd74398
("lakitu: Set default umask to 027")

BUG=b/170409220
BUG=b/155115479
TEST="cuskyctl builds submit lakitu". Also see the TEST section of
     commit 11db1cd74398.
RELEASE_NOTE=None

Change-Id: Ie79df09abe34a04fbdc6505cac1578f7dd1ef9d6
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/8324
Reviewed-by: Saied Kazemi <saied@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
2 files changed