4ba119df5c
Summary: Current clang path in fbcode points to clang 3.5. This diff updates clang path to clang 3.7. Test Plan: Make sure clang 3.7 is in use and all tests are passing. ```lang=bash % USE_CLANG make check ``` Reviewers: meyering, sdong, rven, igor Reviewed By: igor Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D34119