Elaine Low Senior TV WriterThey’re Animaniacs, and they’re rebooting to the max.In the first big musical number of the long-awaited reboot to the beloved ‘90s animated series, the three deranged siblings who live in the Warner Bros. water tower — Yakko, Wakko and Dot — get caught up on the last 22 years since Steven Spielberg and Tom Ruegger’s original “Animaniacs” went off the air.