[MacPorts] #65395: py-numpy: fails to build on macOS 10.14

[MacPorts]

#65395: py-numpy: fails to build on macOS 10.14
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  Reporter:  ra1nb0w   |      Owner:  michaelld
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  py-numpy  |
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Comment (by mascguy):

 Currently reviewing the details of this, since it's blocking builds for
 `py-pytorch` - among other ports - on 10.14.

 And a quick fix - at least to stop the bleeding - may be to simply
 blacklist Clang versions earlier than 11. If that works locally for 10.14,
 I'll commit the change.

 This will give Michael more time to investigate a better option, without
 all of us breathing down his neck.

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Ticket URL: <https://trac.macports.org/ticket/65395#comment:13>
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