move to "S" builds

releng.control/cc_config.xml

@@ -175,7 +175,7 @@
                     value="S" />
                 <property
                     name="buildId"
-                    value="0.5M5" />
+                    value="0.5M6" />
                 <property
                     name="buildBranch"
                     value="R0.5" />
@@ -536,7 +536,7 @@
                     value="S" />
                 <property
                     name="buildId"
-                    value="3.0M5" />
+                    value="3.0M6" />
                 <property
                     name="buildBranch"
                     value="R3.0" />