[MacPorts] #74047: py314-meson cross file arm64-darwin missing subsystem = 'macos', breaks glib2-bootstrap +universal on Intel macOS builder

[MacPorts]

#74047: py314-meson cross file arm64-darwin missing subsystem = 'macos', breaks
glib2-bootstrap +universal on Intel macOS builder
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  Reporter:  Incises      |      Owner:  reneeotten
      Type:  defect       |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.12.5
Resolution:  fixed        |   Keywords:
      Port:  py314-meson  |
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Comment (by reneeotten):

 thank you for the analysis and confirming that {{{+universal}}} build
 works after this change; I have committed your suggested solution to add
 {{{subsystem = 'macos'}}} to the {{{meson}}} cross-compilation files.

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Ticket URL: <https://trac.macports.org/ticket/74047#comment:2>
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