am 91962669: Merge "cutils: list: add list_for_each_safe"

#define list_for_each_reverse(node, list) \

    for (node = (list)->prev; node != (list); node = node->prev)

#define list_for_each_safe(node, next, list) \

    for (node = (list)->next, next = node->next; \

         node != (list); \

         node = next, next = node->next)

void list_init(struct listnode *list);

void list_add_tail(struct listnode *list, struct listnode *item);

void list_remove(struct listnode *item);