This one covers the following cases:
* socket is bound to an interface
* socket isn't bound to an interface

https://github.com/xemul/criu/issues/73
travis-ci: success for series starting with [1/2] socket: Add support for SOCK_PACKET sockets
Signed-off-by: Gleb Valin <the7winds@yandex.ru>
Signed-off-by: Eugene Batalov <eabatalov89@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>