fixed ecfdf7ff from https://gitee.com/zhushengle/kernel_liteos_m/pulls/311

feat: 支持posix 和 cmsis join能力

支持API:
  LOS_TaskJoin
  LOS_TaskDeatch
  pthread_join
  pthread_deatch
  osThreadJoin
  osThreadDetach
Close #I44V26

Signed-off-by: zhushengle <zhushengle@huawei.com>
Change-Id: Ib61e69c280eef2e4b3b79d9bba7bbd5a300c7fe4