set update site url from preprocessed variable


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@816687 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/sigil/eclipse/core.feature/feature.xml b/sigil/eclipse/core.feature/feature.xml
index 40302c5..1a87b49 100644
--- a/sigil/eclipse/core.feature/feature.xml
+++ b/sigil/eclipse/core.feature/feature.xml
@@ -41,9 +41,9 @@
 limitations under the License.
    </license>
 
-   <!--url>
-      <update url="http://replace.with.real.url"/>
-   </url-->
+   <url>
+      <update url="${update-site}"/>
+   </url>
 
    <requires>
       <import plugin="org.eclipse.ant.core"/>