message: xfail HelloWatchpointTestCase on Linux
diff: @@ -39,6 +39,9 @@ class HelloWatchpointTestCase(TestBase):
  @expectedFailureAll(
  oslist=["windows"],
  bugnumber="llvm.org/pr24446: WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows")
  + @expectedFailureAll(
  + oslist=["linux"],
  + bugnumber="https://bugs.swift.org/browse/SR-5555 MyFirstWatchpoint test fails on Ubuntu 16.04")
  def test_hello_watchpoint_using_watchpoint_set(self):
  """Test a simple sequence of watchpoint creation and watchpoint hit."""
  self.build(dictionary=self.d)
  