add M build for incubator
diff --git a/releng.control/checkout.xml b/releng.control/checkout.xml
index 0398f6b..6cc79f0 100644
--- a/releng.control/checkout.xml
+++ b/releng.control/checkout.xml
@@ -265,7 +265,23 @@
         dest="${codir}"
         tag="HEAD" />
   </target>
-
+  <target
+      name="incubator-R0.5-M">
+      <cvs
+          quiet="${env.CVS_QUIET}"
+          reallyquiet="${env.CVS_REALLY_QUIET}"
+          cvsRoot="${mapCvsRoot}"
+          package="${env.RELENG}"
+          dest="${codir}"
+          tag="HEAD" />
+    <cvs
+        quiet="${env.CVS_QUIET}"
+        reallyquiet="${env.CVS_REALLY_QUIET}"
+        cvsRoot="${mapCvsRoot}"
+        package="${env.RELENGMAPS}"
+        dest="${codir}"
+        tag="HEAD" />
+  </target>
 
     <!--
         The order of execution of these three worker targets