test/other: check criu exec

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

test/others/exec/Makefile

+run:
+	./run.sh

test/others/exec/run.sh

+#!/bin/bash
+
+CRIU=../../../criu/criu
+
+set -e -m -x
+
+cat < /dev/zero > /dev/null &
+pid=$!
+sleep 1
+lsof -p $pid
+
+$CRIU exec -t $pid fake_syscall && exit 1 || true
+fd=`$CRIU exec -t $pid open '&/dev/null' 0 | sed 's/.*(\(.*\))/\1/'`
+$CRIU exec -t $pid dup2 $fd 0
+wait $pid
+echo PASS