Add target name to platform link

Author: onur

templates/navigation_rustdoc.hbs

@@ -90,7 +90,7 @@
               <a href="#" class="pure-menu-link"><i class="fa fa-fw fa-gears"></i><span class="title"> Platform</span></a>
               <ul class="pure-menu-children">
                 {{#each doc_targets}}
-                <li class="pure-menu-item"><a href="/{{../../content.crate_details.name}}/{{../../content.crate_details.version}}/{{this}}/{{../../metadata.target_name}}/" class="pure-menu-link">{{this}}</a></li>
+                <li class="pure-menu-item"><a href="/{{../../content.crate_details.name}}/{{../../content.crate_details.version}}/{{this}}/{{../../content.crate_details.target_name}}/" class="pure-menu-link">{{this}}</a></li>
                 {{/each}}
               </ul>
             </li>