[LTP] [PATCH v3] munlockall: add test case that verifies memory has been unlocked

[Petr Vorel]

Hi Dennis,

Reviewed-by: Petr Vorel <pvorel@suse.cz>

LGTM, thanks!

I would just explicitly note the test was rewritten from scratch
(can be added before merge).

Kind regards,
Petr