Expand test/Driver/at_file.c test to check that PR16209 is fixed.

It was fixed by r186603.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@186962 91177308-0d34-0410-b5e6-96231b3b80d8
Going back to using getName for consistency.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@186966 91177308-0d34-0410-b5e6-96231b3b80d8
[libclang] Expose the rest of the array types.

Patch by Che-Liang Chiou!

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@186967 91177308-0d34-0410-b5e6-96231b3b80d8