mount: Don't create kids with CLONE_NEWNS
mount: Don't create kids with CLONE_NEWNS

We explicitly setns() every single task by hands when restoring
mount namespaces, they can be created without the NEWNS flag.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>
Acked-by: Andrey Vagin <74c05afa918858348d6db8037d82fa8124870113@parallels.com>

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