SAN ANTONIO — On your left we have a bottle of Powerade, endorsed by LeBron James. It’s supposedly the stuff he drinks to stay hydrated. (Cue laughter.) On your right we have a bottle of Gatorade, endorsed by Dwyane Wade. When it was mentioned Friday in a question to LeBron James, he refused to speak of the product by name. Then again, the word “Powerade” never came out of James’ mouth, either, a day after “Crampgate” and the broken air conditioning system at the