chore: mark pkgcore#68 as failing locally, not just CI

Signed-off-by: Brian Harring <ferringb@gmail.com>

Author: ferringb

tests/test_contexts.py

@@ -45,6 +45,9 @@ def test_syspath(tmpdir):
             assert mangled_syspath == tuple(sys.path)
 
 
+@pytest.mark.xfail(
+    reason="this currently breaks on github ci, https://github.com/pkgcore/snakeoil/issues/68"
+)
 class TestSplitExec:
     def test_context_process(self):
         # code inside the with statement is run in a separate process