Ryan Adams closed out his Prisoner 2017 tour with a special nod to Tom Petty at Austin City Limits Festival, where he covered Petty’s “Even the Losers” as his final song. In a statement following Petty’s passing, Adams said that the song held a special meaning to him as a kid. “Tom Petty wrote a song called ‘Even the Losers’ that I would sneak into an otherwise-deserted bar after school and…