message: Added reference average pooling kernel fallback
  ensured the kernel calls the raw tensorflow api instead of the compile time error
diff: @@ -144,7 +144,10 @@ TfLiteStatus AverageEvalInt8(const TfLiteContext* context,
  scratch_buffer, GetTensorData<int8_t>(output)),
  ARM_MATH_SUCCESS);
  #else
  -#error ARM_MATH_DSP and ARM_MATH_LOOPUNROLL must be set
  + reference_integer_ops::AveragePool(
  + op_params, GetTensorShape(input), GetTensorData<int8_t>(input),
  + GetTensorShape(output), GetTensorData<int8_t>(output));
  +
  #endif
  return kTfLiteOk;
  }
  