When Glen Powell was inducted into the Texas Film Hall of Fame in Austin May 15, there was one obvious person to give him the honor: The director who discovered Powell, when the actor was just 14 years old, Robert Rodriguez. Powell grew up in Austin right at the moment that it was starting to become a solid film production hub, thanks in large part to Rodriguez, the auteur behind “El Mariachi” and “From Dusk Till Dawn” and who’d founded Austin’s…