Does drying meat in the sun make digesting it easier?
Various food processing methods, such as cooking, can make meat easier, that is faster, to digest. The purpose of drying meat is to extend its shelf life, not to make it more digestible. Drying removes water from the meat and somewhat physically (but not really chemically) change it.

The amount of calories used for digestion is not that high; probably less than 100 Calories per day, so meat prepared in different ways does not likely significantly affect the amount of calories burnt.