Roar: Game of Thrones just got its biggest ratings ever — for an episode that leaked online three days early. The HBO fantasy hit scored 10.2 million viewers for its debut airing Sunday night at 9 p.m. of “The Spoils of War.” That number edges out the show’s previous all-time record holder, the recent season 7 premiere, “Dragonstone” (which premiered to 10.1 million episodes and has since climbed to over 30 million in repeats, streaming and DVR playback).