[MacPorts] #21874: Updated XRG port to newly released version 1.5.1.

[MacPorts]

#21874: Updated XRG port to newly released version 1.5.1.
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 Reporter:  mike@…               |       Owner:  macports-tickets@…                   
     Type:  update               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:  1.8.1                                
 Keywords:                       |        Port:  aqua/xrg                             
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Comment(by mike@…):

 I updated the app to version 1.5.2, so here's the latest Portfile for that
 version.  Thanks.

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Ticket URL: <http://trac.macports.org/ticket/21874#comment:1>
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