docs/index.html: make recent git/email headers links to cgit/gmane

So it is easy to start browsing directly from the homepage.

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

docs/index.html

@@ -23,10 +23,10 @@
 
 <div class="row" style="line-height: 17px;">
   <div class="span6" id="commit-activity">
-    <h2>Recent commits</h2>
+    <a href="http://git.buildroot.net/buildroot"><h2>Recent commits</h2></a>
   </div>
   <div class="span6" id="mailing-list-activity">
-    <h2>Recent discussions</h2>
+    <a href="http://dir.gmane.org/gmane.comp.lib.uclibc.buildroot"><h2>Recent discussions</h2></a>
   </div>
 </div>