ORCHARD PARK, N.Y. — The Buffalo Bills have signed yet another receiver, Marquez Valdes-Scantling, to reshape a position group that lost two starters, including Stefon Diggs. Listed at 6-foot-4 and 206 pounds, he is a two-time Super Bowl champion after spending the past two seasons with the Kansas City Chiefs, where he combined for 63 catches for 1,002 yards and …