`shtest-xunit-output.py` test.
Although there is no `-` file Jeremy Morse has reported to me that it
causes problems in their setup because lit tries to find it and ends up
loading an out of tree lit configuration file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330728 91177308-0d34-0410-b5e6-96231b3b80d8