In a large skillet, cook pork over medium heat until no longer pink; drain. Add onion; saute for 1 minute or until crisp-tender. Add the stir-fry sauce, cilantro and red pepper flakes; cook for 1 minute. Add coleslaw mix; cook 2 minutes longer or until crisp-tender. Spoon filling down the center of tortilla. Fold end and sides over filling.