[MacPorts] #57396: Use hfscompression on buildbot

[MacPorts]

#57396: Use hfscompression on buildbot
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  Reporter:  ryandesign     |      Owner:  admin@…
      Type:  enhancement    |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:                 |
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Comment (by jmroot):

 It should be used already on sufficiently recent OS versions. There has to
 be a `bsdtar` in PATH that supports the `--hfsCompression` flag.

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Ticket URL: <https://trac.macports.org/ticket/57396#comment:1>
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