While Burger King moves forward with its bid to buy Tim Hortons for $11.4 billion and its relocation to be closer to the constitutional monarchy up north, the Canadian chain has taken a very deep dive into fast-food mash-up territory with this “Buffalo Crunch” doughnut, now being served exclusively at the New York State Fair through Monday. It consists of a pull-apart yeast doughnut that’s dunked in Buffalo sauce and crusted with crushed-up chips. …