message: Increase relative error to 1e-4 on convolution_test.
  convolution_test had a zero relative error bound which made it overly sensitive
  to changes to the underlying computation.
diff: @@ -47,9 +47,9 @@ class ConvolutionTest : public ClientLibraryTestBase {
  #if XLA_TEST_BACKEND_GPU
  // XLA:GPU sometimes uses FFT convolution which isn't as precise as spatial
  // convolution. So relax the absolute error threshold.
  - ErrorSpec error_spec_ = ErrorSpec(1e-2);
  + ErrorSpec error_spec_ = ErrorSpec(1e-2, 1e-4);
  #else
  - ErrorSpec error_spec_ = ErrorSpec(1e-4);
  + ErrorSpec error_spec_ = ErrorSpec(1e-4, 1e-4);
  #endif
  };
  