[MacPorts] #56117: logtalk @3.14.0: update to 3.15.0

[MacPorts]

#56117: logtalk @3.14.0: update to 3.15.0
---------------------------------+---------------------
 Reporter:  pmoura               |      Owner:
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:
 Keywords:  haspatch maintainer  |       Port:  logtalk
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 Update the logtalk portfile for the latest release.

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Ticket URL: <https://trac.macports.org/ticket/56117>
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