Ewbank and his refueled Jets will be meeting a Charger team that Coach Sid Gillman has souped up with the acquisition of Tobin Rote, an elderly but still accurate quarterback. Rote has been around a long time, having played for Green Bay, Detroit and Toronto. Gill-man, when he coached the Los Angeles Rams, never found it easy to beat the Ewbank-coached Colts. And next Sunday Gillman will see more than one familiar face on the opposite sidelines. He may be reminded of his old difficulties, to his sorrow.