[MacPorts] #44449: mysql56: improve detection of htonll/ntohll

[MacPorts]

#44449: mysql56: improve detection of htonll/ntohll
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 Reporter:  ryandesign@…  |      Owner:  pixilla@…
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.3.99
 Keywords:  haspatch      |       Port:  mysql56
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 This patch improves mysql56's detection of `htonll`/`ntohll`.

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Ticket URL: <https://trac.macports.org/ticket/44449>
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