[Perl/perl5] 19a1a0: t/op/bop.t: Call "use warnings" pragma after BEGIN...

[TAKAI Kousuke via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 19a1a07578d585f95fec1c1ad85c1fa2c15eb1c8
      
https://github.com/Perl/perl5/commit/19a1a07578d585f95fec1c1ad85c1fa2c15eb1c8
  Author: TAKAI Kousuke <62541129+t-...@users.noreply.github.com>
  Date:   2021-04-19 (Mon, 19 Apr 2021)

  Changed paths:
    M t/op/bop.t

  Log Message:
  -----------
  t/op/bop.t: Call "use warnings" pragma after BEGIN block

This enables set_up_inc() to be honored in processing "use warnings"
and will make stand-alone testing a bit easier.