[MacPorts] #68731: pinentry-mac does not build with Xcode 15

[MacPorts]

#68731: pinentry-mac does not build with Xcode 15
---------------------------+--------------------
  Reporter:  szhorvat      |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  pinentry-mac  |
---------------------------+--------------------

Comment (by Dave-Allured):

 {{{
 Starting logging for pinentry-mac @0.9.4_1
 sysinfo macOS 13.6.2 (darwin/22.6.0) arch arm
 sysinfo MacPorts 2.8.1
 sysinfo Xcode 15.0.1, CLT 15.0.0.0.1.1694021235
 sysinfo SDK 13
 sysinfo MACOSX_DEPLOYMENT_TARGET: 13.0
 }}}

 {{{
 :info:build error: failed to deserialize Info.plist task context:
 Deserialization failed: SDK lookup failed for canonical name: macosx13.3
 (in target 'pinentry-mac' from project 'pinentry-mac')
 }}}

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Ticket URL: <https://trac.macports.org/ticket/68731#comment:1>
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