message: Register int16 as supported ops for AsString in string_ops.cc
diff: @@ -78,7 +78,7 @@ REGISTER_OP("ReduceJoin")
  REGISTER_OP("AsString")
  .Input("input: T")
  .Output("output: string")
  - .Attr("T: {int32, int64, complex64, float, double, bool, int8}")
  + .Attr("T: {int8, int16, int32, int64, complex64, float, double, bool}")
  .Attr("precision: int = -1")
  .Attr("scientific: bool = false")
  .Attr("shortest: bool = false")
  