By DON BABWIN and RICK CALLAHAN, Associated Press CHICAGO (AP) — An infant boy who was cut from a Chicago woman's womb with a butcher knife died Friday at a hospital where he had been in grave condition since the April attack that killed his mother, family spokeswomen said. Yovanny Jadiel (yoh-VAH'-nee YAH'-dee-el) Lopez died at Christ Medical Center in suburban Oak Lawn from a severe brain injury,