[MacPorts] #52575: Report Xcode version and other useful information in main.log

[MacPorts]

#52575: Report Xcode version and other useful information in main.log
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  Reporter:  mojca@…      |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.3.4
Resolution:               |   Keywords:
      Port:               |
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Comment (by ryandesign@…):

 Yes. The log has hundreds or thousands of lines of what to me is rather
 useless information, but doesn't have a prominent display of basic info
 like the macOS version, Xcode version, command line tools version, which
 compiler is selected and its version, the Mac model, the amount of RAM,
 the CPU model, number of cores and speed, amount of free disk space, disk
 format... That's just off the top of my head.

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Ticket URL: <https://trac.macports.org/ticket/52575#comment:1>
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