[MacPorts] #15030: Updated swi-prolog portfile to version 5.6.54

[MacPorts]

#15030: Updated swi-prolog portfile to version 5.6.54
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 Reporter:  pmoura at logtalk.org  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  enhancement         |      Status:  new                                  
 Priority:  Normal              |   Milestone:  Port Updates                         
Component:  ports               |     Version:  1.6.0                                
 Keywords:                      |  
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 Updated swi-prolog portfile to version 5.6.54.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/15030>
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