[MacPorts] #52200: Xcode 8 deprecation of xcrun breaks qt5 build

[MacPorts]

#52200: Xcode 8 deprecation of xcrun breaks qt5 build
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  Reporter:  howarth.at.macports@…  |      Owner:  mcalhoun@…
      Type:  defect                 |     Status:  new
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:  2.3.4
Resolution:                         |   Keywords:  sierra
      Port:  qt5                    |
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Comment (by larryv@…):

 #52310 and #52352 look very similar. Do all the qt5-* ports need this fix?

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Ticket URL: <https://trac.macports.org/ticket/52200#comment:11>
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