[Perl/perl5] f363bf: perl.h: Move #defining SETLOCALE_LOCK

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: f363bf1f855ba0bb36562131723d11320368c7c4
      
https://github.com/Perl/perl5/commit/f363bf1f855ba0bb36562131723d11320368c7c4
  Author: Karl Williamson <k...@cpan.org>
  Date:   2022-09-10 (Sat, 10 Sep 2022)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move #defining SETLOCALE_LOCK

This simplifies slightly, and will allow further simplification