build-image: HACK clean out deleted loop mappings

This is a workaround until we fix or deprecate vmdebootstrap

/dev/loop0 will fail losetup if it doesn't get cleaned out

Signed-off-by: Angus Ainslie (Purism) <angus@akkea.ca>
1 job for clean-loop in 17 seconds (queued for 1 second)
latest