[MacPorts] #63467: opencv4: Add a universal variant

[MacPorts]

#63467: opencv4: Add a universal variant
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  Reporter:  MarkCallow   |      Owner:  stromnov
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  opencv4      |
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Comment (by kencu):

 if you install gmake by itself first, you should be ok:
 {{{
 sudo port clean gmake
 sudo port install gmake
 }}}
 then try your universal build of opencv4

 MacPorts idiosyncracy

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Ticket URL: <https://trac.macports.org/ticket/63467#comment:5>
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