TO LOOK AT HIM, YOU’D never guess it–this is the face of evil? In ““Star Wars: Episode I,’’ Lloyd, 9, will play Anakin Skywalker, the boy who grows up to be Darth Vader. (The dark side won’t beckon until part two.) The prequel is the Los Angeles native’s third film. Laying out why he likes his job, Lloyd speaks in giddy italics: ““It’s doing the acting, meeting the people, going all over the place . . . and the girls go nuts over me.’’ Certain grown-ups go nuts, too, like George Lucas, who’s said to adore him. Steven Spielberg calls him ““one of the scrappiest and most determined kids I’ve seen in a film in recent memory.’’ Wait, you mean you’ve seen the movie? No fair!