[Perl/perl5] 82bce0: locale.c: Add a debugging statement

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 82bce0cf1ab7cd4bc4b204d2b1730b455f2c03dd
      
https://github.com/Perl/perl5/commit/82bce0cf1ab7cd4bc4b204d2b1730b455f2c03dd
  Author: Karl Williamson <k...@cpan.org>
  Date:   2024-01-02 (Tue, 02 Jan 2024)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add a debugging statement

This can be helpful in tracing what's happening with nl_langinfo()
calls.