PNaCl: Update LLVM revision in pnacl/DEPS
PNaCl: Update LLVM revision in pnacl/DEPS

This pulls in the following LLVM changes:

bcbad3c: (mseaborn@chromium.org) PNaCl ABI: Strip out calling conventions from functions and calls

BUG= https://code.google.com/p/nativeclient/issues/detail?id=2346
TEST=PNaCl toolchain trybots

Review URL: https://codereview.chromium.org/16579002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11491 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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