Increase log level for poweroff/reboot/halt

In case the kernel is incapable of handling a reboot,
power-off, or halt request we want to be able to let
the user perform some basic diagnose of the system.

The existing debug messages are good enough, and use
the correct grammar form, to be enabled always.

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

src/sig.c

@@ -206,15 +206,15 @@ void do_shutdown(shutop_t op)
 				do_sleep(1);
 		}
 
-		_d("Rebooting ...");
+		_e("Rebooting ...");
 		reboot(RB_AUTOBOOT);
 	} else if (op == SHUT_OFF) {
-		_d("Powering down ...");
+		_e("Powering down ...");
 		reboot(RB_POWER_OFF);
 	}
 
 	/* Also fallback if any of the other two fails */
-	_d("Halting ...");
+	_e("Halting ...");
 	reboot(RB_HALT_SYSTEM);
 }