[MacPorts] #29316: Update json-glib 0.12.0 -> 0.12.4

[MacPorts]

#29316: Update json-glib 0.12.0 -> 0.12.4
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 Reporter:  macports@…                  |       Owner:  macports-tickets@…                   
     Type:  update                      |      Status:  new                                  
 Priority:  Normal                      |   Milestone:                                       
Component:  ports                       |     Version:  1.9.2                                
 Keywords:                              |        Port:  json-glib                            
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 From NEWS:

 Overview of changes for 0.12.4
 ==============================
 - Fix a bug in JsonObject that led to memory corruption when replacing
   members.
 - Fix introspection annotations.
 - Use AC_CANONICAL_HOST when building, to ease cross-compiling.
 - List GIO in the Requires: clause of the pkg-config file

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Ticket URL: <https://trac.macports.org/ticket/29316>
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