One more follow-up to r179082 - parse PIC/PIE arguments even on platfroms that force default PIC (like Darwin x86-64), otherwise specifying -fPIC will produce bogus unused argument warning

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@179092 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-cxxabi] Add "$$C" when mangling template arg QualTypes

Credit goes to Timur Iskhodzhanov for finding the problem and solution.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@179093 91177308-0d34-0410-b5e6-96231b3b80d8
Mention the changes in the handling of language linkage in the release notes.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@179094 91177308-0d34-0410-b5e6-96231b3b80d8