[Perl/perl5] 3ceb5b: Add test for lexical import in self-recursive lexi...

[Dagfinn Ilmari Mannsåker via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 3ceb5b22c6c1f52a5ab713cdb15ab69872e5b58d
      
https://github.com/Perl/perl5/commit/3ceb5b22c6c1f52a5ab713cdb15ab69872e5b58d
  Author: Dagfinn Ilmari Mannsåker <ilm...@ilmari.org>
  Date:   2023-07-27 (Thu, 27 Jul 2023)

  Changed paths:
    M lib/builtin.t

  Log Message:
  -----------
  Add test for lexical import in self-recursive lexical sub

There were tests for self-recursive regular and anon subs, add lexical
to the mix for completeness.