docs/website/news.html: mention that 2017.02 is a LTS release

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

docs/website/news.html

@@ -45,6 +45,9 @@
 	  <a href="http://lists.busybox.net/pipermail/buildroot/2017-February/185228.html">announcement</a>
 	  and go to the <a href="/downloads/">downloads page</a> to pick up the
 	  <a href="/downloads/buildroot-2017.02.tar.bz2">2017.02 release</a>.</p>
+
+	  <p>Notice that this is a long term support release which will be
+	  supported with security and other important fixes until February 2018.</p>
       </div>
     </div>
   </li>