fsnotify: Add debug printing of the target link

Convenient for debug.

 | (00.005999)   3857: fsnotify:           Restore inotify watch for 0x00800002:0x0000000000000002 (via /proc/self/fd/5 -> /)
 | (00.005999)   3857: fsnotify:           Restore inotify watch for 0x00800002:0x0000000000083a93 (via /home/criu/test/zdtm/live/static/inotify-removed (deleted).cr.1.ghost)

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>