fail if ocamlfind is not installed
fail if ocamlfind is not installed

Summary:
public
We were testing for the wrong program here.

Reviewed By: dulmarod

Differential Revision: D2748990

fb-gh-sync-id: d2af6f6

kstreee/infer,xennygrimmato/infer,kageiit/infer,blzq/infer,blzq/infer,ropas/infer,ryoon/infer,kageiit/infer,kstreee/infer,ropas/infer,jsachs/infer,jvillard/infer,kageiit/infer,kstreee/infer,ryoon/infer,facebook/infer,xennygrimmato/infer,kageiit/infer,jvillard/infer,ropas/infer,jvillard/infer,facebook/infer,jvillard/infer,kageiit/infer,jsachs/infer,facebook/infer,ropas/infer,ryoon/infer,xennygrimmato/infer,jsachs/infer,ryoon/infer,jsachs/infer,xennygrimmato/infer,blzq/infer,jvillard/infer,kstreee/infer,jvillard/infer,ropas/infer,ropas/infer,jvillard/infer,facebook/infer,kageiit/infer,facebook/infer,xennygrimmato/infer,facebook/infer,blzq/infer,kageiit/infer,facebook/infer,jsachs/infer,blzq/infer,jsachs/infer,ryoon/infer,kstreee/infer,kstreee/infer,xennygrimmato/infer,blzq/infer,xennygrimmato/infer,ryoon/infer