“Jack Reacher," based on the Lee Child novel “One Shot," begins chillingly enough with the stigma of the recent tragedy in Connecticut. A sniper looks through his scope and guns down five people in cold blood. But while “Reacher” is far from perfection it doesn’t deserve this kind of relevance, either. The shooting inquiry brings Reacher (Tom Cruise) to Pittsburgh. He’s an investigative officer acquainted with the suspect believed to be