zdtm: check permissions for map_files
zdtm: check permissions for map_files

Cc: Stanislav Kinsburskiy <43b28e187c4fe6e53d7ab0bb71957481e322f182@virtuozzo.com>
Test-for: b67d37d96fa0 ("proc_parse: fix vma file open mode recognition")
Signed-off-by: Andrew Vagin <74c05afa918858348d6db8037d82fa8124870113@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

eabatalov/criu,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote,eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu