[MacPorts] #54125: portaudio upgrade

[MacPorts]

#54125: portaudio upgrade
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 Reporter:  RJVB      |      Owner:
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  haspatch  |       Port:  portaudio
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 port:portaudio is significantly out of date, this patch brings it to the
 current version.

 Bonus modifications:
 - avoids opportunistic dependencies on port:jack
 - adds a variant to install test and example binaries

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Ticket URL: <https://trac.macports.org/ticket/54125>
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