Publish binary releases for common platforms

[sschuberth]

We're considering to add the identify_license tool as what we call a "scanner" to ORT, see here for some context. As such it would be nice if we could easily bootstrap identify_license by simply downloading a binary for the respective platform.

So, would it be possible to cut a new release (also see https://github.com/google/licenseclassifier/issues/37) and attach binary assets to it?