When Steve Earle, Lucinda Williams, Ian Hunter, Son Volt, and Calexico make a record to save your life, you’ve achieved icon status in the music world. Yet despite his performing in bands since the ’70s and solo since the early ’90s, Texas-native Alejandro Escovedo is hardly a household name for those who appreciate roots music. And he rarely sells out East Coast shows. But things are changing. Over the course of the past several months,…