There's no good reason to call setup_mount_entries if we don't have any
lxc.mount.entry. This also avoids an issue on bionic where the tmpfile()
call in setup_mount_entries requires the presence of /tmp which isn't the
case by default.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>