layers/meta-resin: Update to v2.18.0
layers/meta-resin: Update to v2.18.0

Changelog-entry: Update the meta-resin submodule to v2.18.0
Signed-off-by: Florin Sarbu <3a837a37a2ac9072a088641ec330e0e5d5b86f4e@resin.io>

resin-os/resin-raspberrypi,resin-os/resin-raspberrypi