It’s been just over 36 years since the foundational Boston alt-rock band Pixies released their debut album Surfer Rosa. That album’s been on a lot of people’s minds lately because of the untimely passing of Steve Albini, who engineered the record and who didn’t think much of it. Pixies, whose ongoing reunion continues after another lineup change, just shared two new songs that don’t really have anything to do with Surfer Rosa.