Merge "Revert "Switch from clang 3.6 to new clang repository (with 3.8)."" am: a7918b4948 am: adb12a039a
am: 4647caa921

* commit '4647caa9214150f892c050f0986cf9b7e71b1a46':
  Revert "Switch from clang 3.6 to new clang repository (with 3.8)."