[MacPorts] #69027: ddptools should set supported_archs

[MacPorts]

#69027: ddptools should set supported_archs
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  Reporter:  barracuda156  |      Owner:  breun
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  ddptools      |
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Comment (by breun):

 The ddptools binaries are indeed x86_64, but they also work on arm64 via
 Rosetta 2. Should `supported_archs` be set to just `x86_64` or to `x86_64
 arm64` in this case?

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Ticket URL: <https://trac.macports.org/ticket/69027#comment:3>
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