message: XFAIL an lldb-mi test
  the test fails due to a bug in ToT clang
diff: @@ -243,6 +243,8 @@ class MiStackTestCase(lldbmi_testcase.MiTestCaseBase):
  @skipIfWindows # llvm.org/pr24452: Get lldb-mi tests working on Windows
  @skipIfFreeBSD # llvm.org/pr22411: Failure presumably due to known thread races
  + @expectedFailureAll(bugnumber="llvm.org/pr31545", compiler="clang",
  + compiler_version=['>=', '4.0'], archs="i386")
  def test_lldbmi_stack_list_variables(self):
  """Test that 'lldb-mi --interpreter' can shows local variables and arguments."""
  