The RootsDavies Symphony HallBetter than: Sitting still for an orchestraLocal music history was made last night as the Roots performed the first-ever hip-hop concert at Davies Symphony Hall as part of SFJAZZ's Spring season. The Philadelphia-bred, Grammy Award-winning group plays in your living room almost every day if you own a television set; they're the house band for the new Late Night With Jimmy Fallon program, which airs five nights a week on NBC. It's a hardcore commitment for the Roots,