[MacPorts] #20011: Update JRuby to 1.3.1

[MacPorts]

#20011: Update JRuby to 1.3.1
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 Reporter:  andy@…               |       Owner:  macports-tickets@…                   
     Type:  update               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:  1.7.1                                
 Keywords:                       |        Port:  JRuby                                
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 A diff of the updated portfile is attached.

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Ticket URL: <http://trac.macports.org/ticket/20011>
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