Imported using git-ubuntu import.
Changelog parent: 00897d2a2a5282c4639eb4b8f5f950e5c401e1ef
New changelog entries:
* live-build/ubuntu-cpc/hooks/042-vagrant.binary: fix unmount handling
so that the teardown is done properly /before/ we try to make an
image from our filesystem, since otherwise /etc/resolv.conf is broken.
LP: #1621393.