Updated to GEF M4 milestone

Change-Id: I4e90ea228270167c98c995951d5c27291c0e650f
diff --git a/releng/org.eclipse.graphiti.releng/build.rmap b/releng/org.eclipse.graphiti.releng/build.rmap
index 0c96daf..c32012e 100644
--- a/releng/org.eclipse.graphiti.releng/build.rmap
+++ b/releng/org.eclipse.graphiti.releng/build.rmap
@@ -99,7 +99,7 @@
     <rm:provider componentTypes="eclipse.feature,osgi.bundle" readerType="p2" source="false" mutable="false">

       <rm:property key="buckminster.source" value="false"/>

       <rm:property key="buckminster.mutable" value="false"/>

-      <rm:uri format="{0}/graphiti/updates/temp/gef">

+      <rm:uri format="{0}/tools/gef/updates/milestones">

         <bc:propertyRef key="eclipse.downloads"/>

       </rm:uri>

     </rm:provider>