mender-artifact: new recipe
mender-artifact: new recipe

Add recipe for mender-artifact. The resulting package provides
${sysconfdir}/mender/artifact-info file. For backwards compatibility
reasons, the file is currently symlinked to
${sysconfdir}/mender/build_mender.

Fixes: [Mender #764]

Signed-off-by: Maciej Borzecki <f609d9f713abcd5f8f0e51f08dc151638a7681e7@rndity.com>

bboozzoo/meta-mender,bboozzoo/meta-mender,bboozzoo/meta-mender,bboozzoo/meta-mender