[MacPorts] #37320: tbb: add universal variant

[MacPorts]

#37320: tbb: add universal variant
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  Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
      Type:  enhancement   |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  tbb           |
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Comment (by egall@…):

 r117034 made sure that we are UsingTheRightCompiler again... doesn't doing
 that usually make it easier to add a universal variant?

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Ticket URL: <https://trac.macports.org/ticket/37320#comment:9>
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