Summary:
Split off objecthelper into a (future) public and an fb-only version. This also open-sources the very first bit which is pretty useless on its own, but will already compile as its neatly stand-alone.
Note that this blocks releases until we have a stable version of Fresco to depend on.
Reviewed By: oprisnik
Differential Revision: D14149645
fbshipit-source-id: 0020d7ceccf89999695414ce389106ca6325ab7e
e69306b34d