Don't show license for external rpms

Fixes: https://pagure.io/koji/issue/791

www/kojiweb/rpminfo.chtml

@@ -64,9 +64,11 @@
     <tr>
       <th><label title="The MD5 digest of the combined header and payload contents. You can query it by `rpmkeys -Kv foo.rpm`">SIGMD5</label></th><td>$rpm.payloadhash</td>
     </tr>
+    #if $rpm.external_repo_id == 0
     <tr>
       <th>License</th><td>$license</td>
     </tr>
+    #end if
     #if $builtInRoot
     <tr>
       <th>Buildroot</th><td><a href="buildrootinfo?buildrootID=$builtInRoot.id">$util.brLabel($builtInRoot)</a></td>