[MacPorts] #15199: Updated Logtalk portfile to version 2.31.5

[MacPorts]

#15199: Updated Logtalk portfile to version 2.31.5
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 Reporter:  pmoura at logtalk.org  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  defect              |      Status:  new                                  
 Priority:  Normal              |   Milestone:  Port Updates                         
Component:  ports               |     Version:  1.6.0                                
 Keywords:                      |  
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 Updated Logtalk portfile to version 2.31.5.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/15199>
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