[MacPorts] #64488: darktable: add native ARM build

[MacPorts]

#64488: darktable: add native ARM build
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  Reporter:  bal-agates   |      Owner:  mascguy
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.7.2
Resolution:               |   Keywords:
      Port:  darktable    |
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Comment (by mascguy):

 Observers: Please leave this ticket open, until we've verified that the
 ARM build works.

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Ticket URL: <https://trac.macports.org/ticket/64488#comment:8>
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