It was the third day of Rolling Stone’s Future of Music showcase at South by Southwest, in Austin, and Nigerian artist Pheelz had just cleared the Moody Theater stage. A crowd of about six hundred attendees chatted and danced to the music of Dallas DJ OGK as they waited for the next act. Under the stage’s blue lights, I spotted a few heads of colorful hair and a pointy ear or two in the crowd. Flyana Boss’s people are here, I thought.Since late February, hip-hop duo Flyana Boss has been on the road for their first-ever headlining tour. But even though SXSW sets weren’t part of their official Bosstanical Garden Tour duties, they made time to swing by Austin for two festival shows. The duo…