Added Linux Support, Improved code cleanliness

include/dawn/util/array.h

@@ -15,4 +15,4 @@
  * @param right The right element in the array.
  * @return -1 for Left priority, 1 for Right and 0 for Equal.
  */
-typedef int32_t *arraysort_t(void*, void*);
+typedef int32_t arraysort_t(const void*, const void*);