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

This pulls in the following LLVM changes:

cd93e1a: (mseaborn@chromium.org) PNaCl: Fix ExpandTls to handle a couple of corner cases involving PHI nodes

BUG=none
TEST=PNaCl toolchain trybots

Review URL: https://codereview.chromium.org/13150005

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11107 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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