This adds the markup to inform bitbake to rerun the deploy task per MACHINE.
This makes sense since DEPLOY_DIR_IMAGE contains MACHINE. Doing it this
way means the same artefact will be reused from sstate rather than rebuilt.
(From OE-Core rev: 4052e0858d72505728c2a746fac935bf281903fd)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>