Add option to replace path to clang internal headers
Add option to replace path to clang internal headers

Summary: Provide possibility to replace clang internal headers path if they are overwritten by `-isystem`. User needs to specify path to wrong headers to be replaced with infer's clang.

Reviewed By: martinoluca

Differential Revision: D3212850

fb-gh-sync-id: be3d51c
fbshipit-source-id: be3d51c

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