Patrick Hipes Executive Managing EditorCBS’ Big Brother topped primetime Thursday, scoring a 1.0 ratings in the adults 18-49 demographic and 4.06 million viewers on a night that also saw the season finales of CBS’ game show Don’t and the CW competition series Killer Camp.Big Brother, which offered up the season’s first eviction last night, saw its rating dip a tenth from its Wednesday airing, but it was steady with its Season 22 premiere result last week.ABC’s fresh episodes of its game show