Implements backslashes in local filenames.
A typical usecase for such a filename is a systemd unit.
Example: `dev-disk-by\x2dlabel-FOO.device`
(Bitbake rev: 14a35f273b579d5cd5fd92765b89c28f870dd577)
Signed-off-by: Leif Middelschulte <leif.middelschulte@klsmartin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>