DALLAS — — Trevon Brazile scored 18 of his 24 points after halftime and finished with 10 rebounds as No. 17 Arkansas overcame No. 16 Texas Tech 93-86 on Saturday in a rematch of a Sweet 16 game in last season’s NCAA Tournament. Arkansas (8-2), which trailed by as many as 10 points before halftime, went ahead for good on Brazile’s driving layup that made it 78-77 with 5:20 left. A minute