[MacPorts] #16582: Updated swi-prolog portfile for version 5.6.60

[MacPorts]

#16582: Updated swi-prolog portfile for version 5.6.60
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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:                      |        Port:                                       
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 Updated swi-prolog portfile for version 5.6.60.

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Ticket URL: <http://trac.macports.org/ticket/16582>
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