Fix a SSE2 intrinsics typo

Full discourse at:

  http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20131104/092514.html
  http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-November/068124.html

Patch by Dimitry Andric and Alexey Dokuchaev!

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@195558 91177308-0d34-0410-b5e6-96231b3b80d8
Move logic to check if a class is tagged with objc_suppress_protocol_methods into a helper.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@195559 91177308-0d34-0410-b5e6-96231b3b80d8
Remove optional parameter bit from attribute ObjCSuppressProtocol.

This refines some diagnostics and reduces some boilerplate checking logic.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@195560 91177308-0d34-0410-b5e6-96231b3b80d8
Use specific_attr_iterator to tighten loop over ObjCSuppressProtocolAttrs.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@195561 91177308-0d34-0410-b5e6-96231b3b80d8