Clean up the CMake test execution by nuking this directory before we try
to create it. Lit doesn't apparently clean up test directories
effectively, and so this broke randomly on subsequent runs.

Also XFAIL the test on windows, as there's not much hope for these
commands doing the right thing there.

Paired with Nick Lewycky.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126344 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed