R1:8065d7289966

Add a differential.createinline method to Conduit

Summary: a silly thing because I was bored

Test Plan: and I said "arc call-conduit", and there were comments

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1500

Differential Revision: https://secure.phabricator.com/D2971