Roll pnacl llvm rev.
Roll pnacl llvm rev.

66d0d31 Remove comma at end of enumerator, to remove warning.
4390b1a Simplify globals in PNaCl wire format based on normalized constants.
bdad02d Tweak the PNaClLangRef doc with some recent changes

Review CL: https://codereview.chromium.org/18111002/
Review CL: https://codereview.chromium.org/18543004/

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3504
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/18323014

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11665 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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