Corrected defaults.

Change-Id: I9ea50c75014cc03ac91fdef0f5b4fe11395f7074

Author: wwwind

tensorflow/lite/tools/versioning/op_version.cc

@@ -688,15 +688,15 @@ OpSignature GetOpSignature(const OperatorCode* op_code, const Operator* op,
 
     case BuiltinOperator_ADD: {
       auto add_option = op->builtin_options_as_AddOptions();
-      op_sig.options.addsub.pot_scale_int16 = false;
+      op_sig.options.addsub.pot_scale_int16 = true;
       if (add_option) {
         op_sig.options.addsub.pot_scale_int16 = add_option->pot_scale_int16();
       }
     } break;
 
     case BuiltinOperator_SUB: {
       auto sub_option = op->builtin_options_as_SubOptions();
-      op_sig.options.addsub.pot_scale_int16 = false;
+      op_sig.options.addsub.pot_scale_int16 = true;
       op_sig.options.addsub.need_broadcast = false;
       op_sig.options.addsub.num_dims = 1;
       if (sub_option) {