konlet: update to v.0.12.0

BUG=b/335459722
TEST=presubmit, validation, boot and check konlet functionality
RELEASE_NOTE=Updated Konlet to v.0.12.0. This fixes an iptables compatibility issue.

Change-Id: I748909bab77b9ac86ac0698b2973466e5a36c7af
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/70250
Reviewed-by: He Gao <hegao@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
4 files changed