[Perl/perl5] 516721: add diags

[Yves Orton via perl5-changes]

  Branch: refs/heads/yves/open_stdio_hpux_test_issue
  Home:   https://github.com/Perl/perl5
  Commit: 5167212aeaa4685aa7d68ecb236ad3124a0f27db
      
https://github.com/Perl/perl5/commit/5167212aeaa4685aa7d68ecb236ad3124a0f27db
  Author: Yves Orton <demer...@gmail.com>
  Date:   2023-03-31 (Fri, 31 Mar 2023)

  Changed paths:
    M t/io/open.t

  Log Message:
  -----------
  add diags