FRISCO, Texas — After filling a need on the offensive line with Tulsa tackle Tyler Smith with the 24th pick in the first round, the Dallas Cowboys turned their attention to shoring up the pass rush in the second round Friday night. With 56th overall pick, the Cowboys selected took Mississippi linebacker/edge rusher Sam Williams. Williams is an ideal 4-3 end who will combine with free-agent signee Dante Fowler to help make up for the loss of Randy Gregory in free agency. Williams is a first-round talent who likely dropped to the second round because of character concerns. At 6-foot-4, 261 pound…