share_pool: Show sp vmflags in /proc/$pid/smaps

ascend inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI


CVE: NA

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

e80000600000-e80000603000 rw-s 00600000 00:05 1025
/sp_group_1 (deleted)
	Size:                 12 kB
	KernelPageSize:        4 kB
	MMUPageSize:           4 kB
	Rss:                   0 kB
	Pss:                   0 kB
	Shared_Clean:          0 kB
	Shared_Dirty:          0 kB
	Private_Clean:         0 kB
	Private_Dirty:         0 kB
	Referenced:            0 kB
	Anonymous:             0 kB
	LazyFree:              0 kB
	AnonHugePages:         0 kB
	ShmemPmdMapped:        0 kB
	Shared_Hugetlb:        0 kB
	Private_Hugetlb:       0 kB
	Swap:                  0 kB
	SwapPss:               0 kB
	Locked:                0 kB
	THPeligible:    0
	VmFlags: rd wr sh mr mw me ms pf io dc de nr dd sp
                                                        ~~

Signed-off-by: Tang Yizhou <tangyizhou@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>