PHILADELPHIA — When longtime Flyers captain Claude Giroux returned to the Wells Fargo Center for his first game as a member of the Ottawa Senators on Saturday, the organization welcomed him back with a pregame tribute to the tune of chants of “Gi-roooux!” from the local crowd. It turned out, the Flyers would have an even better welcome-back gift waiting for him at the final horn — a win. The Senators snapped their seven-game losing streak by handing the Flyers a 4-1 defeat. The Flyers dominated the puck possession game for its majority, racking up 48 shot attempts to the Senators’ 38, per Natu…