Another prominent black leftist has been outed as the descendant of the slave traders. This time, it’s left-wing rabble-rouser Sunny Hostin of the liberal talkfest “The View,” who has long been an advocate of reparations for slavery and defender of Black Lives Matter. Hostin, whose mother is Puerto Rican and father is black, clung to her Puerto Rican heritage. Yet Hostin was outed as the descendant of Spanish slave traders during an episode of “Finding Your Roots,” a PBS show hosted by Harvard scholar Henry Louis Gates Jr., who is also black. Read: Conservative Matt Walsh Says “Hell No” To Tru…