Restore "udevadm settle" from 8f05b36, see #49

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

finit.c

@@ -331,6 +331,7 @@ int main(int argc, char* argv[])
 	if (fexist("/sbin/udevadm")) {
 		run("/sbin/udevadm trigger --action=add --type=subsystems");
 		run("/sbin/udevadm trigger --action=add --type=devices");
+		run("/sbin/udevadm settle --timeout=120");
 	}
 
 	/*