PHILADELPHIA — The 76ers’ cold shooting in Saturday’s loss to the Chicago Bulls signaled a team on the second night of a back-to-back, at the end of a four-game holiday road trip, and playing without the NBA’s reigning Most Valuable Player. In Tuesday’s rematch at the Wells Fargo Center, the Sixers rode a blistering offensive start to a 110-97 victory, in a game which Joel Embiid notched his second triple-double of the season with 31 points, 15 rebounds and 10 assists in three quarters in a triumphant return from a sprained right ankle. The Sixers (23-10) finally topped the Bulls (15-20), an o…