overlay-lakitu: Rename target-lakitu-gcp -> target-gcp

This fixes an issue that occurs when trying to compile the public
checkout.

BUG=None
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I58ccebe1bd7e0e995c81817a0960933cb01a5188
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/14691
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Roy Yang <royyang@google.com>
2 files changed