The Mender artifact names differed between manual builds and CircleCI
builds: xaprw001-dev vs xaprw001_dev.
The latter with underscores is preferred, since dashes are used when
joining multiple identifiers into a filename, e.g.,
xaprw001_dev-VERSION-gHASH.mender.
The Mender artifact names differed between manual builds and CircleCI builds: xaprw001-dev vs xaprw001_dev.
The latter with underscores is preferred, since dashes are used when joining multiple identifiers into a filename, e.g., xaprw001_dev-VERSION-gHASH.mender.
This commit standarizes on underscores.
Fixes #155