kvm tools: Don't exit() on SIGQUIT

The point of SIGQUIT is to dump relevant information of a running guest, not to
stop it.

Cc: Asias He <asias.hejun@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

main.c

@@ -41,9 +41,6 @@ static void handle_sigquit(int sig)
 	kvm__show_registers(kvm);
 	kvm__show_code(kvm);
 	kvm__show_page_tables(kvm);
-	kvm__delete(kvm);
-
-	exit(1);
 }
 
 static char real_cmdline[2048];