The Ubuntu Xenial cloud server images set the mode of
/var/lib/apt/lists/partial to 700, so when mounted it's inaccessible to
an unprivileged user, resulting in an error:
find: `/tmp/image.aDQKdkRi/mnt/var/lib/apt/lists/partial': Permission denied
There's no reason an image should come with anything already in
/var/lib/apt/lists/partial, so just avoid trying to descend into that
directory when fixing the apt translations packages.
Change-Id: Id27f0166bfb09d67200f337a5ffff2f2037b7c1c
a9b38d0b60