The remains of a woman were found stuffed inside a black plastic bag in the basement of a Brooklyn building Sunday, police and law-enforcement sources said. Cops responded to a 911 call for an unconscious person at The Borinquen Public Houses at 330 Bushwick Avenue on the border of Williamsburg and Bushwick at 9:38 a.m., police said. In the basement of the NYCHA apartment building, officers found the remains of an adult woman in a black plastic bag, the sources and cops said. The investigation