Updated status post-Chicago

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@192057 91177308-0d34-0410-b5e6-96231b3b80d8
LWG Issue 2247

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@192058 91177308-0d34-0410-b5e6-96231b3b80d8