The Jacks whipped up a special version of the track to celebrate Black’s induction into the Five-Timers Club Jack White and Jack Black on Saturday Night Live , photo by Will Heath/NBC via Getty Images Jack White performed and Jack Black hosted the April 4 edition of Saturday Night Live, an occasion that could only be marked with a choir-backed rendition of the White Stripes’ classic “Seven Nation Army.” Black and White’s first collaboration came early in the episode, during Black’s monologue. Joined by fellow five-timers Jonah Hill, Tina Fey (who hosted the premiere of SNL UK earlier this year), Candice Bergen, and Melissa McCarthy, Black tries to spiff up the deteriorating and cobweb-covered Five-Timers lounge.…