app: show go hashes in each row on sub-repo pages

Change-Id: I5c9ed4e588e9f8319cc39dbca8ca8c1c4a7e39ed
Reviewed-on: https://go-review.googlesource.com/13058
Reviewed-by: Andrew Gerrand <[email protected]>

Author: adg

app/build/ui.html

@@ -99,7 +99,7 @@ <h1>Go Dashboard</h1>
         {{if $i}}
           <td>&nbsp;</td>
         {{if $h}} 
-          <td>&nbsp;</td>
+          <td class="hash"><a href="{{repoURL $.Dashboard.Name $h ""}}">{{shortHash $h}}</a></td>
         {{end}}
           <td>&nbsp;</td>
           <td>&nbsp;</td>