PNaCl: Update Clang revision in pnacl/DEPS to get guard variable change
PNaCl: Update Clang revision in pnacl/DEPS to get guard variable change

This pulls in the following Clang change:
8f0218f: (mseaborn@chromium.org) Switch back to non-ARM ABI for C++ guard variables under PNaCl

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3450
TEST=PNaCl toolchain trybots

Review URL: https://codereview.chromium.org/17580027

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11609 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client