Bonnaroo. Lollapalooza. Coachella. Firefly? That’s the goal for the second-year festival: Get mentioned in the same breath as the largest and most famous in the country. And with the success it’s had in its first year-plus of existence, Firefly might be well on its way. The Atlantic Coast has always lacked a signature festival. While the West is rife with multiday music events, Easterners have had to travel as far as Chicago or Manchester, Tenn., to get their fix.