In 2003, Veruca Salt released an EP entitled “Officially Dead.” Recorded five years after band co-founder Nina Gordon had left the band and three years after Veruca Salt’s only post-Gordon album, 2000’s “Resolver,” the recording’s name was an accurate assessment of the band’s unfortunate fate. But yesterday Veruca Salt — more reformed than dead — took to the stage at Jaxx for a show that was more nostalgic than it was necessary. It wasn’t that…