message: [mlir/tensorflow] Fix windows build
  Error fixed: error C2039: 'isdigit': is not a member of 'std'
  The error is caused by CL/272736262
diff: @@ -1794,8 +1794,8 @@ ObjectNames::ObjectNames(const SavedObjectGraph& object_graph,
  // - `model.variables.0`
  // - `model.keras_api.layers.1.keras_api.trainable_variables.0`
  // - ... 10 more long aliases ending in digits ...
  - return std::make_tuple(std::isdigit(a.back()), a.size(), a) <
  - std::make_tuple(std::isdigit(b.back()), b.size(), b);
  + return std::make_tuple(isdigit(a.back()), a.size(), a) <
  + std::make_tuple(isdigit(b.back()), b.size(), b);
  });
  for (const std::string& name : kv.second) {
  if (IsExported(name)) {
  