[MacPorts] #65650: cargo-c: Add universal variant

[MacPorts]

#65650: cargo-c: Add universal variant
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  Reporter:  potterpg     |      Owner:  MarcusCalhoun-Lopez
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  cargo-c      |
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Comment (by potterpg):

 So how does one correct the profile to actually mimic the rust profile?

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Ticket URL: <https://trac.macports.org/ticket/65650#comment:3>
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