project-lakitu: Use by-partlabel link for ESP partition.

/dev/sda12 will not be present in ARM machines, which breaks
cgroup_helper in ARM. Use /dev/disk/by-partlabel link instead of
/dev/sda12.

Fix lint error at line#117.

BUG=b/232831046
TEST=Manual test, presubmit
RELEASE_NOTE=None

Change-Id: Ibb3808dcc692ae1063761d24cddfd60f48bd4fde
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/32844
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Roy Yang <royyang@google.com>
2 files changed