angstrom-image: allow empty passwords
angstrom-image: allow empty passwords

In the long run we'd need to add an 'angstrom' user.

Signed-off-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@dominion.thruhere.net>

kraj/meta-angstrom,kraj/meta-angstrom,kraj/meta-angstrom