[MacPorts] #50671: boost: Update to 1.65.0

[MacPorts]

#50671: boost: Update to 1.65.0
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  Reporter:  eborisch  |      Owner:  ryandesign
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.3.4
Resolution:            |   Keywords:  haspatch
      Port:  boost     |
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Changes (by mamoll):

 * Attachment "boost+python36+openmpi_1.65.0_log.txt.zip" added.

 boost 1.65.0 build log for macOS 10.12.6 latest, Xcode latest, +openmpi
 +python36 variants

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Ticket URL: <https://trac.macports.org/ticket/50671>
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