[Perl/perl5] afc6e1: locale.c: Simplify some preprocessor directives

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: afc6e1ac7f0c8208d2dba809f585e996fd63548f
      
https://github.com/Perl/perl5/commit/afc6e1ac7f0c8208d2dba809f585e996fd63548f
  Author: Karl Williamson <k...@cpan.org>
  Date:   2024-01-21 (Sun, 21 Jan 2024)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Simplify some preprocessor directives

This bit of common code is to be compiled if any combination of three
other bits get compiled.  Have each of them #define a symbol that it got
compiled, so that the common bit only needs to check for that #define