By Harriet McLeod CHARLESTON, South Carolina (Reuters) - Rapper DMX, whose real name is Earl Simmons, was arrested on Tuesday in South Carolina and charged with possession of marijuana, two days before he was due in court on a drunk driving charge. Police stopped a truck in which Simmons was a passenger for making an improper lane change shortly before midnight, according to a police report. On inspecting the car, police found three bags of marijuana, the report said. Simmons complained of a medical condition and was aggressive, police said. ...