[MacPorts] #22786: tango-icon-theme-extras : fix livecheck.url

[MacPorts]

#22786: tango-icon-theme-extras : fix livecheck.url
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 Reporter:  neric27@…           |       Owner:  macports-tickets@…                   
     Type:  defect              |      Status:  new                                  
 Priority:  Normal              |   Milestone:                                       
Component:  ports               |     Version:  1.8.1                                
 Keywords:                      |        Port:  tango-icon-theme-extras              
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 the link to tango-icon-theme-extras seems to have vanished from the
 homepage, so I now use the release directory index.

 Please see attached patch.

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Ticket URL: <http://trac.macports.org/ticket/22786>
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