Revert "Switch from clang 3.6 to new clang repository (with 3.8)."

This reverts commit 1332828b6ea25250c497609a1d4b2c7e28227ff9.

Bug: 25141123

Change-Id: Idd5d8757095b2b370046a84aea76bc95e16f3876
2 files changed