[MacPorts] #55583: port:snappy : restore shared library build (and use the up-to-date cmake PG)

[MacPorts]

#55583: port:snappy : restore shared library build (and use the up-to-date cmake
PG)
---------------------+-----------------
  Reporter:  RJVB    |      Owner:
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  snappy  |
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Changes (by RJVB):

 * Attachment "snappy.diff" added.


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Ticket URL: <https://trac.macports.org/ticket/55583>
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