[MacPorts] #62956: Update libxml2 to 2.9.12

[MacPorts]

#62956: Update libxml2 to 2.9.12
-------------------------+------------------------
  Reporter:  ghosthound  |      Owner:  ghosthound
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  fixed       |   Keywords:
      Port:  libxml2     |
-------------------------+------------------------
Changes (by ghosthound):

 * status:  assigned => closed
 * resolution:   => fixed


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Ticket URL: <https://trac.macports.org/ticket/62956#comment:2>
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