[MacPorts] #60514: qt5-mysql-plugin: add variant for mariadb 10.2

[MacPorts]

#60514: qt5-mysql-plugin: add variant for mariadb 10.2
-------------------------------+---------------------------------
  Reporter:  ctreleaven        |      Owner:  MarcusCalhoun-Lopez
      Type:  enhancement       |     Status:  assigned
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.6.2
Resolution:                    |   Keywords:
      Port:  qt5-mysql-plugin  |
-------------------------------+---------------------------------
Changes (by ctreleaven):

 * owner:  (none) => MarcusCalhoun-Lopez


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Ticket URL: <https://trac.macports.org/ticket/60514#comment:1>
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