With the recent cleanups in fdinfo parsing the memory
allocation policy for entries has changed, thus keeping
a pointer on the entry handle is no longer valid (it
will be freed soon).

Said that -- duplicate the memory for queued irmap work.

https://github.com/xemul/criu/issues/328Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>