Some Intel Penryn CPUs come with SSE4 disabled. Detect them as core 2.

PR16721.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187350 91177308-0d34-0410-b5e6-96231b3b80d8
ExceptionDemo.cpp: Tweak a @param. [-Wdocumentation]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187351 91177308-0d34-0410-b5e6-96231b3b80d8