message: Small improvement to TANH/Sigmoid implementation.
diff: @@ -312,7 +312,7 @@ void EvalUsingLookupTableTanh16Bit(struct OpData* data, const TfLiteTensor* inpu
  int32_t input_data = *ptr_input_data;
  if (data->input_left_shift == 1) {
  - input_data = gemmlowp::SaturatingRoundingMultiplyByPOT<1>(input_data);
  + input_data <<= 1;
  }
  // Scale by 3/4 to expand range [-8,8]->[-10.7,10.7].
  