[MacPorts] #50671: boost: Update to 1.64.0

[MacPorts]

#50671: boost: Update to 1.64.0
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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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Comment (by michaelld):

 Yeah; sure. Thee's so much work to do to update boost that we rarely get
 around to doing it!

 I've attached a tarball of the port directory, with updates to patches so
 that they are clean (note that "files/patch-log-setup-link.diff" has been
 removed). I've included the patch that fixes
 boost::serialization::make_array to be included as part of
 boost::serialization, as it was in 1.63 and will be in 1.65; not sure if
 we should actually include it or not.

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Ticket URL: <https://trac.macports.org/ticket/50671#comment:41>
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