restore join of integer values
restore join of integer values

Summary:
public
4feb93e91c585abc694e582f193d75bc49de28b4 disabled join of tuple values, but also of any two values of the same
type. However, we do know how to join integer values, so re-enable those.

Reviewed By: cristianoc

Differential Revision: D2803286

fb-gh-sync-id: 5bcc725

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