[Perl/perl5] 0a1bd1: Update IO.xs to conform to ppport.h 3.68 recommend...

[Todd Rinaldo via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 0a1bd1ca787858675f565880ef436197b0ae5f22
      
https://github.com/Perl/perl5/commit/0a1bd1ca787858675f565880ef436197b0ae5f22
  Author: Todd Rinaldo <to...@cpan.org>
  Date:   2022-04-18 (Mon, 18 Apr 2022)

  Changed paths:
    M dist/IO/ChangeLog
    M dist/IO/IO.pm
    M dist/IO/IO.xs

  Log Message:
  -----------
  Update IO.xs to conform to ppport.h 3.68 recommendations

Bump version to 1.49_01 and update Changelog