Add a link to the Rust privacy notice to the footer

Fixes #955.

Author: carols10cents

app/templates/application.hbs

@@ -132,6 +132,8 @@
   <span class="sep">|</span>
   <a href='https://www.rust-lang.org/policies/security'>Report a security issue</a>
   <span class="sep">|</span>
+  <a href='https://www.rust-lang.org/policies/privacy'>Privacy notice</a>
+  <span class="sep">|</span>
   {{#link-to 'policies'}}Policies{{/link-to}}
 </footer>