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

This pulls in the following LLVM changes:

43102ff Enable ABI verification check for whitelisting external symbols [Eli Bendersky]

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3339
R=jvoung@google.com

Review URL: https://codereview.chromium.org/18547002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11661 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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