SACRAMENTO - Gov. Arnold Schwarzenegger is poised to throw his star power, and political clout, behind tax breaks for the entertainment industry aimed at keeping film productions in the state. ``It is extremely important that we continue supporting our motion picture industry and that we, as a state, do everything that we can,'' he told a mostly entertainment-industry crowd at a glittery, Hollywood-style premiere Tuesday night. To help the state create jobs for everyone from caterers and janitors to make-up artists and gaffers, Schwarzenegger said, ``we are working right now through the legislators on a bill to give tax credits,...