TORONTO — The Canadian talking and tweeting hitchhiking robot that met its untimely end in the United States over the weekend might be given another chance at life. HitchBOT’s co-creators, Frauke Zeller and David Smith, said Monday that they’ve been overwhelmed with support and offers to revive the robot since it was vandalized beyond repair and left on a street in Philadelphia on Saturday, and they are considering rebuilding it. The robot was on a hitchhiking, social-experiment adventure in the U.S.