[MacPorts] #56648: blosc: Don't use bundled libraries

[MacPorts]

#56648: blosc: Don't use bundled libraries
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  Reporter:  ryandesign  |      Owner:  stromnov
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  blosc       |
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Changes (by stromnov):

 * Attachment "blosc.diff" added.

 Use system lz4, zlib and zstd (but not snappy).

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Ticket URL: <https://trac.macports.org/ticket/56648>
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