c/r: uidmapshift criu images on restore
c/r: uidmapshift criu images on restore

This is necessary so that once the criu processes clone to the restore userns
they can open the image files.

Signed-off-by: Tycho Andersen <10c18fcb898ee6b17d6575d444b125d10b3f4d6a@canonical.com>

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