As he stood along one side of Howard Jones Field, his team’s first spring practice complete , USC coach Lincoln Riley echoed the mantra of another top sports franchise. “ We’ve got talent, ” Riley said Tuesday. “Now we’ve got to build a team.” If all goes as planned, the phrase that carried the New England Patriots to six Super Bowl championships will help Riley’s team finally reach the College Football Playoff after four seasons that ended in frustration. The Trojans’ team-building started