[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:  cotvnc macports-notifier pinentry-  |
  mac terminal-notifier xhyve                    |
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Comment (by pmetzger):

 BTW note that the kludge for this is really only needed for destroot.
 Typically if the build itself fails and is fixed by this, it means that
 the include statements in the sources are incorrectly using angle brackets
 instead of double quotes.

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Ticket URL: <https://trac.macports.org/ticket/57234#comment:9>
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