[MacPorts] #53048: libbiosig @1.8.0: update to 1.8.4

[MacPorts]

#53048: libbiosig @1.8.0: update to 1.8.4
-------------------------+---------------------------------
  Reporter:  neurodroid  |      Owner:
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  haspatch maintainer
      Port:  libbiosig   |
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Changes (by neurodroid):

 * Attachment "Portfile-libbiosig.diff" added.

 libbiosig Portfile patch

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Ticket URL: <https://trac.macports.org/ticket/53048>
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