[Perl/perl5] ebf8e1: Explicitly add nsl to libswanted on Solaris

[Leon Timmermans via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: ebf8e1962065fb9f16a6f6c76fa3c0d49d6e7193
      
https://github.com/Perl/perl5/commit/ebf8e1962065fb9f16a6f6c76fa3c0d49d6e7193
  Author: Leon Timmermans <faw...@gmail.com>
  Date:   2022-09-05 (Mon, 05 Sep 2022)

  Changed paths:
    M hints/solaris_2.sh

  Log Message:
  -----------
  Explicitly add nsl to libswanted on Solaris

7e19816aa8661ce0e984742e2df11dd20dcdff18 removed it from the default
list, but it is apparently still necessary on Solaris so we add it back
in the hints file.