message: Print the SBDebugger.CreateTarget error message.
  This is failing on the bot but not locally.  Maybe
  the error message will tell us why.
diff: @@ -39,7 +39,9 @@ class FindAppInMacOSAppBundle(TestBase):
  # It optionally takes an SBLaunchOption argument if you want to pass
  # arguments or environment variables.
  exe = os.path.join(os.getcwd(), "TestApp.app")
  - target = self.dbg.CreateTarget(exe)
  + error = lldb.SBError()
  + target = self.dbg.CreateTarget(exe, None, None, False, error)
  + self.assertTrue(error.Success(), "Could not create target: %s"%(error.GetCString()))
  self.assertTrue(target.IsValid(), "Target: TestApp.app is not valid.")
  exe_module_spec = target.GetExecutable()
  self.assertTrue(exe_module_spec.GetFilename(), "TestApp")
  