BARCELONA — They say you should act like you’ve been there before. With a Euroleague-best 396 career 3-pointers, Cantu’s Gianluca Basile had been there plenty. Still, with the clock racing toward triple zeroes and the game tied at 64 in Bilbao, nobody thought Basile’s 35-foot heave would turn into number 397. Then it did, and some 8,000 Bilbao supporters sat in stunned silence. The scoreboard told them that Cantu had taken the lead 67-64, and that in one-tenth of a second their