[MacPorts] #64088: cargo-c fails to build on 10.13

[MacPorts]

#64088: cargo-c fails to build on 10.13
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 Reporter:  bK4gYuRo  |      Owner:  (none)
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  cargo-c   |       Port:  cargo-c
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 As far as I can check, the build fails on buildbots too.

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Ticket URL: <https://trac.macports.org/ticket/64088>
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