Oscar hopes for "Birdman" got an enormous updraft over the weekend with big wins from the acting and producing guilds, possibly sending the comedy soaring over the perceived Academy Awards front-runner "Boyhood."Alejandro Gonzalez Inarritu's elegantly crafted backstage romp won best ensemble Sunday night at the 21st annual Screen Actors Guild, a day after it also won the top honor at the Producer Guild Awards.