dump: Add missing new lines

Otherwise output looks like

Dumping core (pid: 16953)
----------------------------------------
Dumping GP/FPU registers ... OK
Obtainting personality ... OK
Obtainting task auvx ... Dumping path for 1 fd via self 19 [/home/crtools/test/legacy/test-inotify]
Dumping header ... ----------------------------------------

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