Note sparc tests.

misc/plan.html

@@ -117,6 +117,8 @@
     <li class='done'> m68k-linux-gnu (aranym)</li>
     <li class='done'> alpha-linux-gnu (qemu)</li>
     <li class='done'> hppa-linux-gnu (qemu)</li>
+    <li class='done'> sparc32-linux-gnu</li>
+    <li class='done'> sparc64-linux-gnu</li>
     <li class='wish'> armv7-android </li>
   </ul>