Every year, the veteran country-rocker Steve Earle headlines his annual John Henry’s Friends benefit, raising money for children diagnosed with autism. Last night, Earle’s John Henry’s Friends show went down at Town Hall in New York. Earle once again headlined, and he brought some friends along. Rosanne Cash, Willie Nile, the Mastersons, and Matt Savage all played the show. So did one Bruce Springsteen.