Add branch or tag icon to ref in builds page

app/views/projects/ci/builds/_build.html.haml

@@ -22,6 +22,8 @@
 
       - if defined?(ref) && ref
         - if build.ref
+          .icon-container
+            = build.tag? ? icon('tag') : icon('code-fork')
           = link_to build.ref, namespace_project_commits_path(build.project.namespace, build.project, build.ref), class: "monospace branch-name"
         - else
           .light none