[MacPorts] #70275: c-ares 1.30.0_1 build fails on 10.13.6

[MacPorts]

#70275: c-ares 1.30.0_1 build fails on 10.13.6
-------------------------+-----------------------------
 Reporter:  jrandall814  |      Owner:  (none)
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.9.3
 Keywords:               |       Port:  c-ares 1.30.0_1
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 My attempt to upgrade c-ares 1.28.0_1 to c-ares 1.30.0_1 from source fails
 with an error on build. I run macports 2.9.3 on Mac OS 10.13.6. The log
 file is attached.

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Ticket URL: <https://trac.macports.org/ticket/70275>
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