perf buildid-cache: Use lsdir() for looking up buildid caches

int build_id_cache__list_build_ids(const char *pathname,

				   struct strlist **result)

{

	struct strlist *list;

	char *dir_name;

	DIR *dir;

	struct dirent *d;

	int ret = 0;

	list = strlist__new(NULL, NULL);

	dir_name = build_id_cache__dirname_from_path(pathname, false, false);

	if (!list || !dir_name) {

		ret = -ENOMEM;

		goto out;

	}

	if (!dir_name)

		return -ENOMEM;

	/* List up all dirents */

	dir = opendir(dir_name);

	if (!dir) {

	*result = lsdir(dir_name, lsdir_no_dot_filter);

	if (!*result)

		ret = -errno;

		goto out;

	}

	while ((d = readdir(dir)) != NULL) {

		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))

			continue;

		strlist__add(list, d->d_name);

	}

	closedir(dir);

out:

	free(dir_name);

	if (ret)

		strlist__delete(list);

	else

		*result = list;

	return ret;

}