[MacPorts] #56931: amtk: use gobject_introspection Port Group

[MacPorts]

#56931: amtk: use gobject_introspection Port Group
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 Reporter:  dbevans      |      Owner:  kencu
     Type:  enhancement  |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  amtk
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 First, thanks Ken for this port which will be important in the 3.30 GNOME
 release next month.  Please feel free to add yourself as a maintainer to
 any of the GNOME ports that strikes your fancy.

 As I am suggesting, amtk can use the gobject_introspection PortGroup since
 this is an autotools port.  See other GNOME ports for usage.

 FYI, I'm looking at making a new 1.1 version of the PortGroup that
 understands both autotools and meson and makes the right selections.
 Might, also be useful to move the introspection compiler fixup block to
 the Port Group rather than replicating it in every port from now on. Let
 me know if you have any suggestions.

 Copying @ryandesign since he is the original author of the PortGroup.

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Ticket URL: <https://trac.macports.org/ticket/56931>
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