[MacPorts] #43441: gtk2: add bundle variant

[MacPorts]

#43441: gtk2: add bundle variant
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 Reporter:  help@…       |      Owner:  macports-tickets@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.2.1
 Keywords:               |       Port:  gtk2
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 GTK2 has to be built with --enable-quartz-relocation configure flag to be
 able to work when included in application bundle. Unfortunately it's not
 compatible with operation as usual installation so it can't enabled by
 default. Attached patch adds new variant called "bundle" for this feature.
 When activated it prints a warning.

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Ticket URL: <https://trac.macports.org/ticket/43441>
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