[MacPorts] #57234: Some ports are failing to build due to new build system in Xcode 10

[MacPorts]

#57234: Some ports are failing to build due to new build system in Xcode 10
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  Reporter:  mf2k                                |      Owner:  (none)
      Type:  defect                              |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:  xcode10
      Port:  BGHUDAppKit  cotvnc gimp-app        |
  macports-notifier MacVim pinentry-mac          |
  terminal-notifier VLC xhyve                    |
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Comment (by d0wntime):

 this also affects the mkconsole port.

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Ticket URL: <https://trac.macports.org/ticket/57234#comment:21>
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