[MacPorts] #53307: Update libvpx to v1.6.1

[MacPorts]

#53307: Update libvpx to v1.6.1
---------------------------+----------------------
  Reporter:  johannkoenig  |      Owner:  dbevans
      Type:  update        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  libvpx        |
---------------------------+----------------------
Changes (by jmroot):

 * status:  new => assigned
 * owner:   => dbevans
 * port:   => libvpx
 * cc: dbevans (removed)


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Ticket URL: <https://trac.macports.org/ticket/53307#comment:1>
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