Fix cleanup of loop devices in !fakemachine mode
Fix cleanup of loop devices in !fakemachine mode

Pass ImagePartitionAction by reference such that usingLoop can actually
be correctly set. This fixes cleanup of loop devices.

Signed-off-by: Sjoerd Simons <1371fd10dd05a897e5b55dc6ae4fbafa1f84c6ec@collabora.co.uk>

d4s/debos,go-debos/debos