Un-enable TestEvents test on linux

Test still seems to fail about 1/10 runs. Skipping the test, but it a more greppable fashion.

llvm-svn: 238826

lldb/test/python_api/event/TestEvents.py

@@ -22,6 +22,8 @@ class EventAPITestCase(TestBase):
 
     @python_api_test
     @dwarf_test
+    @expectedFailureLinux("llvm.org/pr23730") # Flaky, fails ~1/10 cases
+    @skipIfLinux # skip to avoid crashes
     def test_listen_for_and_print_event_with_dwarf(self):
         """Exercise SBEvent API."""
         self.buildDwarf()