[FCP] calculate clang commit hash correctly [6/N]
[FCP] calculate clang commit hash correctly [6/N]

Reviewed By: ngorogiannis

Differential Revision: D23315607

fbshipit-source-id: d5074c528

jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer