* Synopsys falls after forecasting FY25 revenue below estimates * Focus on Friday's payrolls data * Indexes: Dow down 0.4%, S&P 500 off 0.1%, Nasdaq down 0.01% By Caroline Valetkevitch NEW YORK, Dec 5 - U.S. stocks were little changed on Thursday, with technology shares easing after recent sharp gains and investors bracing for Friday's jobs report, but all three …