[MacPorts] #32920: liblrdf: update to 0.5.0

[MacPorts]

#32920: liblrdf: update to 0.5.0
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 Reporter:  ryandesign@…             |       Owner:  pixilla@…           
     Type:  defect                   |      Status:  new                 
 Priority:  Normal                   |   Milestone:                      
Component:  ports                    |     Version:  2.0.3               
 Keywords:  haspatch                 |        Port:  liblrdf             
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 Here's a patch that updates liblrdf to 0.5.0, and now uses a distfile
 instead of fetching from git. The changelog says the big change for 0.5.0
 is using raptor2, and that's what the port's existing patches deal with.
 The patches still apply, so I wasn't sure if any further changes were
 needed before committing. It builds for me, but I didn't test any ports
 that depend on liblrdf.

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Ticket URL: <https://trac.macports.org/ticket/32920>
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