hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4SK3S
CVE: NA

--------------------------------

Add ReliableTaskUsed in /proc/meminfo if memory reliable is enabled.
- ReliableTaskUsed: reliable memory used by special user tasks and
  global init process

Change variable reliable_user_used_nr_page to a more accurate
reliable_task_used_nr_page.
Signed-off-by: NMa Wupeng <mawupeng1@huawei.com>
Reviewed-by: Kefeng Wang<wangkefeng.wang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>