Non-HBO subscribers will soon be able to watch some of the network’s old TV shows, like “The Sopranos” and “The Wire,” on Amazon Prime’s streaming video service. Amazon described the deal as a first for HBO, which has a reputation for being tightfisted with its library of hit shows — even ones that stopped airing years ago. The assortment of HBO shows will be a significant addition to Amazon Prime as it attempts to sign up more monthly subscribers and challenge Netflix.