[MacPorts] #57092: wxgtk-3.0 build fails on 10.12

[MacPorts]

#57092: wxgtk-3.0 build fails on 10.12
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 Reporter:  jwhowse4  |      Owner:  (none)
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.5.3
 Keywords:            |       Port:  wxgtk-3.0
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 On MacOS 10.12.6 with XCode 9.2, the build for wxgtk-3.0 fails with the
 errors in the attacked log file.  Any suggestions for a fix?

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Ticket URL: <https://trac.macports.org/ticket/57092>
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