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

This pulls in the following LLVM changes:

7216560: (mseaborn@chromium.org) PNaCl: Add ExpandVarArgs pass for expanding out variable-args function calls

BUG=none
TEST=PNaCl toolchain trybots

Review URL: https://codereview.chromium.org/12995012

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11036 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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