tree-wide: use _cleanup_set_free_ and friends

Instead of _cleanup_(set_freep) or so.

src/core/unit.c

@@ -1082,7 +1082,7 @@ static void unit_merge_dependencies(Unit *u, Unit *other) {
         }
 
         for (;;) {
-                _cleanup_(hashmap_freep) Hashmap *other_deps = NULL;
+                _cleanup_hashmap_free_ Hashmap *other_deps = NULL;
                 UnitDependencyInfo di_back;
                 Unit *back;