added webrtc adapter to freedom-*-for-uproxy

And fixed the error with it (to do with insertion of createIceCandidate into third_party, we should probably remove that and have third_Party only be third_party code.
So, I've been finding it useful to give the exact versions. If nothing else, it makes it trivial to determine the exact version with which a uproxy-lib NPM was built. This is especially important until Freedom uses semantic versioning -- otherwise, we'll wind up unexpectedly getting new APIs and things (this has already happened in the past).