Add testcase missed from r181527.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181531 91177308-0d34-0410-b5e6-96231b3b80d8
Switch C++1y paper links back to the canonical location at open-std.org now that the post-Bristol mailing has shipped.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181533 91177308-0d34-0410-b5e6-96231b3b80d8