virtio-serial: Update copyright year to 2010

Signed-off-by: NAmit Shah <amit.shah@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/virtio-console.c

 /*
  * Virtio Console and Generic Serial Port Devices
  *
- * Copyright Red Hat, Inc. 2009
+ * Copyright Red Hat, Inc. 2009, 2010
  *
  * Authors:
  *  Amit Shah <amit.shah@redhat.com>

hw/virtio-serial-bus.c

 /*
  * A bus for connecting virtio serial and console ports
  *
- * Copyright (C) 2009 Red Hat, Inc.
+ * Copyright (C) 2009, 2010 Red Hat, Inc.
  *
  * Author(s):
  *  Amit Shah <amit.shah@redhat.com>

hw/virtio-serial.h

@@ -2,7 +2,7 @@
  * Virtio Serial / Console Support
  *
  * Copyright IBM, Corp. 2008
- * Copyright Red Hat, Inc. 2009
+ * Copyright Red Hat, Inc. 2009, 2010
  *
  * Authors:
  *  Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>