Fix dead link.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211469 91177308-0d34-0410-b5e6-96231b3b80d8
[cxx_status] Be a bit more precise.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211470 91177308-0d34-0410-b5e6-96231b3b80d8
[cxx_status] Minor wording tweaks.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211471 91177308-0d34-0410-b5e6-96231b3b80d8