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

This pulls in the following LLVM changes:

e97e431: (kschimpf@google.com) Fix forward reference bug in pnacl-bcdis.
134ec52: (jfb@chromium.org) PNaCl: run constantmerge after globalizing constant vectors

TBR= jvoung@chromium.org
BUG=none
TEST= PNaCl toolchain trybots

Review URL: https://codereview.chromium.org/327943005

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@13316 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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