message: relax error bound of sumdup due to hip with gnu<7
diff: @@ -365,7 +365,8 @@ TYPED_TEST(DeviceMatrixData, SumsDuplicates)
  max_error, std::abs(arrays.values.get_const_data()[i] -
  ref_arrays.values.get_const_data()[i]));
  }
  - ASSERT_LT(max_error, r<value_type>::value);
  + // when Hip with GNU < 7, it will give a little difference.
  + ASSERT_LT(max_error, 2 * r<value_type>::value);
  }
  