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

This pulls in the following LLVM changes:

33f698a: (mseaborn@chromium.org) PNaCl: Add "-pnacl-abi-simplify-{pre,post}opt" meta-passes to "opt"

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3435
TEST=LLVM change pre-tested via PNaCl toolchain trybots

Review URL: https://codereview.chromium.org/15831005

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11404 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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