Last month, Sally Phillips interviewed a producer of the documentary “Rumble: The Indians Who Rocked the World,” which traces the influence of Native Americans in rock music. The conversation reignited the longtime KWMR host’s passion for discussing film. (She graduated with a degree in film three decades ago.) “Afterwards I went over to Lyons [Filmer, the station’s programing director] and said, ‘I want to do a show like this,’” she said. Her new show, called…