message: Add 2nd input documentation for ReshapeOperator
  Reshape kernel already supports output tensor shape specification as the 2nd
  input.
diff: @@ -1129,6 +1129,7 @@ struct StridedSliceOperator : Operator {
  //
  // Inputs:
  // inputs[0]: required: the input array
  +// inputs[1]: optional: the output tensor shape
  //
  // TensorFlow equivalent: Reshape --- except that we only support a special case
  // here, where the output shape is a matrix (2D) shape.
  