SYDNEY — Mel Gibson’s Icon Entertainment is setting up an Australian production division alongside its planned distribution arm.Icon, co-owned by Bruce Davey, has signed a joint venture with Gibson’s Oz talent agency Shanahan’s, called Icon Shanahan’s Prods. Short-film producer and helmer Sally Chesher has been tapped as creative director. So far no projects have been secured and Davey wouldn’t comment on how much capital will be invested in the undertaking. Icon’s Down Under production venture with 20th Century Fox dissolved after three years without producing anything. Icon Distribution, topped by Mark Gooder, acquired its first feature for release — Randall Wallace’s “We Were Soldiers Once … and Young,” which stars Gibson.