NEW YORK — A woman died early Tuesday after she was dumped at a Bronx hospital naked from the waist down — and doctors suspect she was the victim of a botched butt injection, police sources said. Two mystery women are being sought after they drove 53-year-old Maxine Messam to Jacobi Medical Center in her own BMW SUV and then walked off, leaving the vehicle behind. “We don’t know what happened,” the victim’s husband, Carlos Simpson, told the Daily News, speaking outside the family’s home in Bridgeport, Connecticut. “She was at work and she left work. So we don’t know what happened from there.” …