seize: increase timeout of freezing processes

The timeout between iterations should be the save oder
with scheduler timeslice, which is about 100 msec.

Currently we wait for inly 10 msec, which is obviously not enough.

Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>