[wwwdocs] Update C++ DR list

[Marek Polacek]

A small update.

Applied to CVS.

Index: cxx-dr-status.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/cxx-dr-status.html,v
retrieving revision 1.23
diff -u -r1.23 cxx-dr-status.html
--- cxx-dr-status.html  8 Jul 2019 18:51:50 -0000       1.23
+++ cxx-dr-status.html  21 Jul 2019 20:58:37 -0000
@@ -2970,7 +2970,7 @@
       <td><a href="http://wg21.link/cwg421";>421</a></td>
       <td>CD1</td>
       <td>Is rvalue.field an rvalue?</td>
-      <td class="unsupported">?</td>
+      <td class="supported">Yes</td>
       <td></td>
     </tr>
     <tr>
@@ -4335,8 +4335,8 @@
       <td><a href="http://wg21.link/cwg616";>616</a></td>
       <td>CD3</td>
       <td>Definition of &#8220;indeterminate value&#8221;</td>
-      <td class="unsupported">?</td>
-      <td></td>
+      <td class="supported">9</td>
+      <td><a href="https://gcc.gnu.org/PR67853";>PR67853</a></td>
     </tr>
     <tr class="open">
       <td><a href="http://wg21.link/cwg617";>617</a></td>
@@ -8515,7 +8515,7 @@
       <td><a href="http://wg21.link/cwg1213";>1213</a></td>
       <td>CD3</td>
       <td>Array subscripting and xvalues</td>
-      <td class="unsupported">?</td>
+      <td class="supported">9</td>
       <td></td>
     </tr>
     <tr>