[MacPorts] #48983: portconfigure.tcl : fix for building on Linux

[MacPorts]

#48983: portconfigure.tcl : fix for building on Linux
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  Reporter:  rjvbertin@…  |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.3.3
Resolution:               |   Keywords:  haspatch
      Port:               |
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Comment (by raimue@…):

 This makes `darwin` a special case and `linux` the general case. It should
 probably be the other way around.

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Ticket URL: <https://trac.macports.org/ticket/48983#comment:1>
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