[MacPorts] #53470: port:audacity build fix (and upgrade for audacity-devel)

[MacPorts]

#53470: port:audacity build fix (and upgrade for audacity-devel)
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 Reporter:  RJVB      |      Owner:
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  haspatch  |       Port:  audacity
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 Attached 2 patches for port:audacity:

 - an updated patchfile that reenables building with the latest cctools
 installed and on 10.12
 - an updated Portfile that pushes a 2.1.3 alpha release.

 I don't think that a revbump is required because the port either builds or
 it doesn't.

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Ticket URL: <https://trac.macports.org/ticket/53470>
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