[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:  MarcusCalhoun-Lopez
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:  highsierra
      Port:  cargo-c   |
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Comment (by mascguy):

 Replying to [comment:33 cjones051073]:
 > Are you asking if someone can schedule a build of cargo-c for you, or
 *how* to schedule a build ?

 I know how to schedule a build, and can now do so.

 Instead, what I'm specifically asking about, is whether folks with
 buildbot access can remove a prior `failcache` entry via the buildbot GUI.
 (And without having to make a dummy change to the portfile.) Make sense?

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Ticket URL: <https://trac.macports.org/ticket/64088#comment:34>
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