[MacPorts] #34673: xapian-bindings: use subports

[MacPorts]

#34673: xapian-bindings: use subports
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 Reporter:  ryandesign@…             |       Owner:  dcolish@…        
     Type:  enhancement              |      Status:  new              
 Priority:  Normal                   |   Milestone:                   
Component:  ports                    |     Version:  2.1.1            
 Keywords:                           |        Port:  xapian-bindings  
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 As already mentioned in comment:ticket:29653:3, the xapian-bindings port
 should use subports instead of variants for each binding.

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Ticket URL: <https://trac.macports.org/ticket/34673>
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