The University of Southern California has decided to keep Clay Helton as its football coach, ignoring his 5-7 record this year, including a loss to arch-rival UCLA. Helton presided over the Trojans' first losing season since 2000, but USC athletic director Lynn Swann said today he will be back. He may have been swayed by USC’s superior effort in a narrow loss to undefeated Notre Dame. Many boosters and fans were clamoring for a coaching change, but Helton owns a contract…