before I get fired, final attempt at a valid tag for 3.9.0 release

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/tags/3_9_0@13908 b35dd754-fafc-0310-a699-88a17e54d16e

build/build.xml

@@ -61,7 +61,7 @@
 
     <property name="version.major" value="3"/>
     <property name="version.minor" value="9"/>
-    <property name="version.revision" value=""/>
+    <property name="version.revision" value="0"/>
     <property name="version.extra" value=""/>    <!-- For 'beta' or 'alpha' -->
     <property name="dist.prefix" value="openfire"/>