Update status of support for variable templates on website.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187785 91177308-0d34-0410-b5e6-96231b3b80d8

www/cxx_status.html

@@ -452,7 +452,7 @@ available.</p>
     <tr>
       <td>Variable templates</td>
       <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3651.pdf">N3651</a></td>
-      <td class="none" align="center">No</td>
+      <td class="partial" align="center">Partial</td>
     </tr>
     <tr>
       <td>Relaxing requirements on constexpr functions</td>