This goes undetected most of the time, but when updating a repository,
if the ud.fullmirror file is not present, you end up getting an
exception instead of carrying on because the errno module is not
loaded (specifically "if exc.errno != errno.ENOENT").
(Bitbake rev: e6fca8480731ce817df9bee61438347a5e3d3017)
Signed-off-by: Kristian Amlie <kristian.amlie@mender.io>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>