There’s nothing wrong with a little theft — when it’s done right, that is. The incomparable Jonathan Lethem, in his recent essay for Harper’s, taught me that. Unlike the second performer last night at TT’s, local acoustic guy Brendan Little, who brought to mind about ten different blasé singer-songwriters when he sang “You ain't living till you died/Once or twice” from the track entitled “Boring,” Mean Creak (also of Boston) borrowed from all the best places during their set.