Added build for X.509 contacts app.

samples/contacts/maven.xml

@@ -22,6 +22,10 @@
 
         <!-- filter war -->
         <j:set var="webapp" value="filter"/>
+        <attainGoal name="acegisecurity:war"/>
+
+        <!-- x509 war -->
+        <j:set var="webapp" value="x509"/>
         <attainGoal name="acegisecurity:war"/>
 		
 		<!-- delete generic artifact (we only want our three custom WARs) -->