Currently the contents of zz-dash-packages is as follows:
dash rm -rf /var/tmp/.guestfs
It should be:
dash
This fixes that.
Also, the guestfs location that needs removing has a
uuid appended, so we add a wildcard to the removal.
Change-Id: If53f55c901f5abf19bdfff0c0f17c2f9ed69d915