add facets to lucene-contrib/index.xml

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_3x@1166544 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lucene/src/site/src/documentation/content/xdocs/lucene-contrib/index.xml b/lucene/src/site/src/documentation/content/xdocs/lucene-contrib/index.xml
index 8929230..e0648df 100644
--- a/lucene/src/site/src/documentation/content/xdocs/lucene-contrib/index.xml
+++ b/lucene/src/site/src/documentation/content/xdocs/lucene-contrib/index.xml
@@ -65,6 +65,11 @@
                    <a href="../gettingstarted.html">Getting Started</a>.</p>
                 <p>See <a href="../api/contrib-demo/index.html">demo javadoc</a></p>
             </section>
+
+            <section id="facet"><title>facet</title>
+                <p>Provides faceted indexing and search capabilities</p>
+                <p>See <a href="../api/contrib-facet/index.html">grouping javadoc</a></p>
+            </section>
             
             <section id="grouping"><title>grouping</title>
                 <p>Groups search results according to a specified field</p>