[ocamlformat] Support passing args to ocamlformat
[ocamlformat] Support passing args to ocamlformat

Summary: Useful for testing / debugging ocamlformat updates

Reviewed By: skcho

Differential Revision: D21395971

fbshipit-source-id: d4f2f2dcb

jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,jvillard/infer,jvillard/infer,facebook/infer,facebook/infer,facebook/infer,facebook/infer,facebook/infer,jvillard/infer