Roll llvm stable revs to include recent changes:
Roll llvm stable revs to include recent changes:

* Don't emit useless warning when dropping arguments from main
* Exclude vector and array calls from being rewritten
* Add PRESUBMIT check to warn if the working branch does not track origin/maste
Review URL: https://codereview.chromium.org/10948042

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@9783 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client