Rename test to match C++1y paragraph number per N3690, and add additional test
case inspired by a stackoverflow question.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@185772 91177308-0d34-0410-b5e6-96231b3b80d8
Fixed source range for functional cast and unresolved construct expr nodes.
Added testcases.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@185773 91177308-0d34-0410-b5e6-96231b3b80d8