[MacPorts] #61849: gobject-introspection: Configure failure on Big Sur 11.1 and Xcode 12.3

[MacPorts]

#61849: gobject-introspection: Configure failure on Big Sur 11.1 and Xcode 12.3
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  Reporter:  mf2k                   |      Owner:  dbevans
      Type:  defect                 |     Status:  assigned
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:
Resolution:                         |   Keywords:
      Port:  gobject-introspection  |
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Comment (by jmroot):

 We do want to build for 11.0 if possible. If 11.1 introduces new APIs,
 binaries won't work for users running 11.0.

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Ticket URL: <https://trac.macports.org/ticket/61849#comment:4>
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