PORTLAND, Ore. — Before the start of the second half, Drew Timme gathered the Bulldogs at midcourt. The emotional leader yelled and repeatedly pointed up at the Moda Center scoreboard, which depicted Gonzaga’s 10-point deficit. No doubt the star junior forward stressed the need for Gonzaga to play its best 20 minutes of basketball or else the NCAA tournament’s No. 1 overall seed was going to make an unexpected early exit from the Big Dance. Message received. With Timme scoring 21 of his game-high 25 points in the second half, Gonzaga recovered from their sloppy start, surged past No. 9 seed Me…