By Marc WeingartenAs media choices proliferate and attention spans shrink, the shelf life of pop musicians grows increasingly shorter. Some careers seem to last about as long as a flash-cut in a music video.All of which makes the success of the Goo Goo Dolls that much more remarkable. After years of slogging it out on the Northeastern club circuit, the three Buffalo, N.Y., natives broke through big time in 1996 with their fifth album, “A Boy Named Goo,” and its plaintive Top 10 single “Name.”But the pop landscape has changed radically since then. Alternative rock, a genre with which the band w