PNaCL Update llvm stable rev to include 
PNaCL Update llvm stable rev to include 

http://codereview.chromium.org/7184015/

and elminate special treatment for ARM when buiding libgcc
Review URL: http://codereview.chromium.org/7202006

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@5704 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client