[MacPorts] #43663: wavpack: fix pkgconfig file.

[MacPorts]

#43663: wavpack: fix pkgconfig file.
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  Reporter:  ionic@…  |      Owner:  rmstonecipher@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:  haspatch
      Port:  wavpack  |
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Comment (by devans@…):

 Note that the pkgconfig file was fixed in r119897 and ports relying on
 pkgconfig to detect wavpack were revbumped/updated (r119898, r119912) to
 take advantage of the change with the exception of sox which apparently
 doesn't use pkgconfig and xmms2 which is currently broken.

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Ticket URL: <https://trac.macports.org/ticket/43663#comment:2>
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