[MacPorts] #59068: carthage @0.33.0_0 build fails with Xcode 11

[MacPorts]

#59068: carthage @0.33.0_0 build fails with Xcode 11
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 Reporter:  i0ntempest  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.5.4
 Keywords:              |       Port:  carthage
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 build log attached

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Ticket URL: <https://trac.macports.org/ticket/59068>
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