Killboy heads to Dallas this fall. (Picture courtesy Warner Bros.) Singer-songwriter Killboy drops “Loser” Queer singer Killboy designed a splash with her attractive female-to-girl single “U+Me” previously this calendar year. She’s again not only with her new one “Loser,” but also a tour announcement.  Made by Avril Lavigne and Blink-182 producer John Feldmann, “Loser” is a more durable-edged audio by the Texas-elevated singer introducing one more layer to her alt-pop vibe of earlier tracks. The track follows her Atlantic Information debut solitary “Daddy Concerns.”  Killboy will head to Dallas this tumble as the supporting act for Sueco’s North American It Was Fun Though it Lasted Tour. She will open up…