Tests for DR321-330.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200672 91177308-0d34-0410-b5e6-96231b3b80d8
Implement DR329. We already did the right thing here in C++98 mode, but r104014
(which implemented the DR) was disabled in C++11.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200673 91177308-0d34-0410-b5e6-96231b3b80d8
Update C++ DR page now 3.4 has been released.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200674 91177308-0d34-0410-b5e6-96231b3b80d8