add version.mli
add version.mli

Summary:
public
version.ml changes at each commit, which triggers the recompilation of all .ml
files that depend on it. Adding version.mli should prevent that.

Reviewed By: jberdine

Differential Revision: D2748986

fb-gh-sync-id: 5a59a14

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