[MacPorts] #67875: Buildbot on Intel tries to build PowerPC ports

[MacPorts]

#67875: Buildbot on Intel tries to build PowerPC ports
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  Reporter:  ryandesign     |      Owner:  admin@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:                 |
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Comment (by barracuda156):

 But if it ''is'' needed to add an OS version restriction into ppc-only
 ports, let me know, I will add to mine (perhaps the few which are there
 are mine anyway): it won’t hurt to make them for `darwin < 11`.

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Ticket URL: <https://trac.macports.org/ticket/67875#comment:3>
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