(Reuters) – McDonald’s Corp CEO Don Thompson sure could use a break. The head of the world’s biggest restaurant chain, who for much of his two years at the helm has been battling to spark sales growth in the United States and Europe, got battered by headline-grabbing bad news in late July. In the final days of the month, its China business was hit with a food-safety scare involving a key supplier; the chain got ensnared in […]