message: Change compute set name of combined Negate operation
  Grappler must be eliminating a different node from the top level graph
diff: @@ -837,15 +837,16 @@ class IpuFuseOpsTest(xla_test.XLATestCase):
  self.assertAllClose(out, [1.0])
  report.parse_log()
  +
  # pylint: disable=line-too-long
  ok = [
  '__seed*',
  '/Zero',
  - 'GradientDescent/update_vs/w/Neg/negate*/Op/Negate',
  'GradientDescent/update_vs/w/mul/fusion*/Op/Multiply',
  'GradientDescent/update_vs/w/ResourceScatterAdd/custom-call*/multiUpdateAdd',
  'gradients/vs/absolute_difference/Abs_grad/Sign',
  'gradients/vs/absolute_difference/Abs_grad/mul/fusion',
  + 'gradients/vs/absolute_difference/Sub_grad/Neg/negate*/Op/Negate',
  'vs/embedding_lookup/gather.*/multiSlice',
  'vs/absolute_difference/Sub/subtract.*/AddTo',
  'vs/absolute_difference/Abs/abs.*/Op/Absolute',
  