change label to "S" build

releng.control/cc_config.xml

@@ -689,7 +689,7 @@
     -->
   
    <project
-        name="wtp-R3.1-I">
+        name="wtp-R3.1-S">
         <modificationset
             quietperiod="120">
             <cvs
@@ -725,7 +725,7 @@
             <ant antscript="${env.RELENG_CONTROL}/ant_low_priority.sh">
                 <property
                     name="buildType"
-                    value="I"/>
+                    value="S"/>
                 <property
                     name="buildId"
                     value="3.1"/>