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

This pulls in the following LLVM changes:

5f40649: (dschuff@chromium.org) Add switch support to integer promotion pass
663c1c9: (dschuff@chromium.org) Enable integer promotion pass and add ABI check for integer types

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3360

TEST=PNaCl toolchain trybots (run with LLVM change)
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/15701013

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11430 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client