message: xfail a TestRegisters.py test which only works with a new debugserver --
  there are some CI bots that use a pre-built/pre-signed debugserver and
  they will fail with the change in expected output until we fix the bots
  to sign the debugserver they just built, or update the prebuilt
  debugserver.
  <rdar://problem/34092153>
diff: @@ -72,6 +72,7 @@ class RegisterCommandsTestCase(TestBase):
  @skipIfFreeBSD # llvm.org/pr25057
  @skipIf(archs=no_match(['amd64', 'i386', 'x86_64']))
  @expectedFailureAll(oslist=["linux"], bugnumber="rdar://29054801")
  + @expectedFailureDarwin(bugnumber="<rdar://problem/34092153>") # CI bots need to use updated debugserver to match ftag size change in r311579.
  def test_fp_special_purpose_register_read(self):
  """Test commands that read fpu special purpose registers."""
  self.build()
  