Integrate meta-seconorth-distro/cherry-pick-db2988c5

Commit: seco-ne/yocto/layers/meta-seconorth-distro@d2c52b3c

fng-install:self-update: Added missing -r option to copy

The fngsystem-self-update runs the post-install steps on a temporary directory and copies the files afterwards to the Flash-N-Go System partition. We now have an optional overlays folder which also needs to be copied and therefore need the recursive (-r) option on the cp call.

(cherry picked from commit db2988c54a3628bddf4df4575f2beafefb551c80)