Austin Butler refused to get his head shaved for ‘Dune 2’ so he wouldn’t wreck the look of ‘The Bikeriders’ film. The ‘Elvis’ actor, 32, plays biker Benny Bauer in the new movie, and its makers almost ran into trouble as just before the project started filming as before the star could start to work on the project he had to wrap up his work on ‘Dune 2’ as villain Feyd-Rautha – who sports a smooth scalp. Filmmaker Jeff Nichols, 45, told The Hollywood Reporter about how Austin helped him out: “We had a conversation, and I was like, ‘Look, man, you’ve got to do what you’ve got to do. “It’s ‘Dune: …