[MacPorts] #61307: ghostscript 9.52 fails to build on macOS 10.13.6

[MacPorts]

#61307: ghostscript 9.52 fails to build on macOS 10.13.6
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  Reporter:  bK4gYuRo     |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.3
Resolution:               |   Keywords:
      Port:  ghostscript  |
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Comment (by kencu):

 Yeah - looks like a combo of things in the end -- the freetype update did
 indeed break all ghostcript builds on all systems, as  figured, but there
 are also other errors that relate to xcode12 specifically that needed
 other fixes.

 fun, fun, fun :>

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Ticket URL: <https://trac.macports.org/ticket/61307#comment:6>
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