xfail TestQueues on macOS

This test is failing on CI.  I cannot get it to fail on my
local setup.

Tracked by:
rdar://28658529

llvm-svn: 283492

lldb/packages/Python/lldbsuite/test/macosx/queues/TestQueues.py

@@ -18,6 +18,7 @@ class TestQueues(TestBase):
 
     @skipUnlessDarwin
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(bugnumber="rdar://28658529")
     def test_with_python_api(self):
         """Test queues inspection SB APIs."""
         self.build()