LOS ANGELES — Xavier Henry scored 18 points, Pau Gasol hit two tiebreaking free throws with 6 seconds remaining, and the Los Angeles Lakers, who lost all of a 21-point lead, beat the Atlanta Hawks 105-103 on Sunday night. Henry started at forward for the first time as a Laker and the 19th time in 137 NBA games, while Nick Young came off the bench. Henry, who received nine stitches in his forehead during Friday's loss to San Antonio after colliding with teammate Wesley Johnson's knee on a drive to the basket and missed all six of his shots that night, was 5 for 11 from the field against the Hawks.