[MacPorts] #55962: rust @1.24.0: universal variant does not build universal

[MacPorts]

#55962: rust @1.24.0: universal variant does not build universal
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  Reporter:  ryandesign  |      Owner:  g5pw
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  rust        |
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Comment (by MarcusCalhoun-Lopez):

 Attached is a proposed solution for making rust build universal
 binaries.[[BR]]
 Included is also a fix for #55956.

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Ticket URL: <https://trac.macports.org/ticket/55962#comment:2>
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