These tests all seem to pass on my machine, marking them as non-Xfail on Darwin, or clang where applicable. Non-Apple folks, if these fail for you, maybe we can put some more helpful markers on them

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@219020 91177308-0d34-0410-b5e6-96231b3b80d8