kernel: add initial object manager definitions

obj/set.c

@@ -0,0 +1,16 @@
+#include <socks/object.h>
+
+struct set {
+	queue_t s_list;
+	spin_lock_t s_lock;
+};
+
+static object_type_t set_type = {
+	.ob_name = "set",
+	.ob_size = sizeof(struct set),
+};
+
+void init_set_objects(void)
+{
+	object_type_register(&set_type);
+}