Add a testcase from pr16059.

It was fixed back in r182750, but this is a nice testcase to have.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@182818 91177308-0d34-0410-b5e6-96231b3b80d8
Fix bad indentation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@182821 91177308-0d34-0410-b5e6-96231b3b80d8