By Donny Kwok HONG KONG (Reuters) – Bill Clinton did it. So did Boris Johnson, the mayor of London. For many tourists, even if they are not former U.S. presidents, a trip to Hong Kong isn’t over till they pick up a made-to-measure outfit from one of its family-run tailor shops. As consumers worldwide seek out custom-made clothing to set them apart from the ready-to-wear crowd, the Hong Kong bespoke industry’s reputation for quality and speedy delivery ought to have helped the former British colony build on its advantage. …