ALIENS ANONYMOUS--Still under tight wraps is what a Baby Drac looks like. Louis Gossett Jr. plays the alien Papa in the Christmas-week release of 20th Century Fox's "Enemy Mine," set on the planet Draconia. Your kid might cry for one to take home, a la E.T., but no toy deals have been signed. Drac Jr. is supposed to be "cute," with three fingers. During the film, written by Ed Khmara and directed by Wolfgang Petersen, Baby Drac grows from a very young child. Although the adult Drac can look fierce, Junior is cuddly, our sources assure us.