[MacPorts] #73419: skia: add a port

[MacPorts]

#73419: skia: add a port
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  Reporter:  barracuda156  |      Owner:  (none)
      Type:  request       |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.11.6
Resolution:                |   Keywords:
      Port:  skia          |
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Comment (by ryandesign):

 The Aseprite port builds a specific branch of a forked version of Skia
 created just for Aseprite. I don't know how it is for other projects, but
 if they also require a specific branch of Skia or modifications on top of
 Skia, that would make a port of the standard version of Skia less useful.

 You can at least look at the Aseprite port for an example of how Skia can
 be built (e.g. some peculiarities of how to handle the gn build system).

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Ticket URL: <https://trac.macports.org/ticket/73419#comment:1>
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