For the past several weekends, The Truth, at 101.5 FM, has broadcast music, as opposed to offering the sort of right-wing syndicated blather that dominates its airwaves Monday through Friday. But this particular aspect of its format has already gone through as many personalities as the famously three-faced Eve. First up: full-monty stripper music reminiscent of the stunt format called The Pole. Then soft-rock and easy-listening fare. And finally, a schizophrenic blend of the two, with som