[MacPorts] #67197: libopenraw: add a legacy option for system without Rust

[MacPorts]

#67197: libopenraw: add a legacy option for system without Rust
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  Reporter:  barracuda156  |      Owner:  mascguy
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:  powerpc, leopard, snowleopard
      Port:  libopenraw    |
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Comment (by barracuda156):

 This one is apparently the latest version without Rust:
 https://github.com/macports/macports-
 ports/tree/5910feee35d95da0b0b7ee444dd5c864ad9ce53d/graphics/libopenraw

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Ticket URL: <https://trac.macports.org/ticket/67197#comment:4>
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