hwloc Cache Detection Logic Errors

[insertinterestingnamehere]

#75 replaced HWLOC_OBJ_CACHE with HWLOC_OBJ_CACHE_UNIFIED in the hwloc topology code, but this replacement doesn't make sense there since these are values of two different types of enum. See

qthreads/src/affinity/hwloc.c

Lines 137 to 141 in f040053

	hwloc_obj_type_t shep_type_options[] = {
	HWLOC_OBJ_NODE, HWLOC_OBJ_CACHE_UNIFIED, HWLOC_OBJ_SOCKET, HWLOC_OBJ_CORE,
	HWLOC_OBJ_PU,
	HWLOC_OBJ_CACHE_UNIFIED, HWLOC_OBJ_CACHE_UNIFIED, HWLOC_OBJ_CACHE_UNIFIED, HWLOC_OBJ_CACHE_UNIFIED
	};

for an example of where this would be a problem. Since the values for both enums are just the defaults, HWLOC_OBJ_CACHE_UNIFIED has the same binary value as HWLOC_OBJ_MACHINE. In our hwloc detection logic HWLOC_OBJ_CACHE_UNIFIED is frequently cast to type hwloc_obj_type_t which will throw off all the logic around caches throughout the rest of the file since we'll be getting values from functions like hwloc_get_depth_type that correspond to HWLOC_OBJ_MACHINE instead of anything to do with caches.