Jorge Masvidal knows that no one will take him seriously as a UFC lightweight contender until he registers some stoppage wins. Luckily for the Strikeforce vet, he believes he’s fighting a “watered-down Royce Gracie ” next week at UFC on FOX 8. Masvidal, a 28-year-old American Top Team product who’s fought for a variety of major promotions, made his long-awaited UFC debut in April and scored a decision victory over a tough Tim Means . But the hard-hitting Masvidal had trouble dealing with his opponent and reverted to his wrestling base to secure the win. “A victory’s a victory, and I learned a couple things fighting Tim Means,” he told MMAjunkie.com Radio (www.mmajunkie.com/radio). “I learned a couple things I can do to southpaws, some of the tricky stuff he does. But I was upset because the whole camp I had southpaws working with me, welterweight and middleweights …