[MacPorts] #50600: Update x265 to 1.9

[MacPorts]

#50600: Update x265 to 1.9
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  Reporter:  rynkidd@…  |      Owner:  ays388@…
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  x265       |
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Comment (by macports.org@…):

 I did make a manual build of 1.9 to be used with ffmpeg-devel, which
 otherwise cannot be built in the +x265 variant currently. It works.

 How can I support here? (I never maintained a package for macports so far,
 but for Linux).

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Ticket URL: <https://trac.macports.org/ticket/50600#comment:2>
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