Fix collision of spec file names on case insensitive file systems.
Fix collision of spec file names on case insensitive file systems.

Reviewed By: sblackshear

Differential Revision: D2892930

fb-gh-sync-id: 4db2cab

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