AUTHORS: adjust to preferred spelling

maybe sounds strange but I've used this signature for years.
see http://en.wikipedia.org/wiki/Family_name

AUTHORS

@@ -134,7 +134,7 @@ Patches have also been contributed by:
   Lai Jiangshan        <laijs@cn.fujitsu.com>
   Harsh Prateek Bora   <harsh@linux.vnet.ibm.com>
   John Morrissey       <jwm@horde.net>
-  Kamezawa Hiroyuki    <kamezawa.hiroyu@jp.fujitsu.com>
+  KAMEZAWA Hiroyuki    <kamezawa.hiroyu@jp.fujitsu.com>
   Wen Congyang         <wency@cn.fujitsu.com>
   Hu Tao               <hutao@cn.fujitsu.com>
   Laurent Léonard      <laurent@open-minds.org>