BOSTON — DJ Lundy intercepted a pass to set up his own 1-yard touchdown run and No. 3 Florida State scored four unanswered touchdowns to build a 21-point lead but then blew almost all of it, surviving a late Boston College charge to win 31-29 on Saturday. Boston College set a school record for penalties, missed an extra point, went for 2 after another touchdown and failed, and opted not to kick a field goal from the Seminoles’ 5-yard line when trailing by 15 points early in the fourth quarter.