[perl #112584] Passing command line options to “perl6” causes the USAGE automatic generation to print an incorrect program name

[Christian Bartolomaeus via RT]

This works now and it looks like it has been fixed for quite a while.

IMHO this was the same problem as that from RT #113078 ("[BUG] $*PROGRAM_NAME 
erroneously reports the first argument to 'perl6', even when this argument 
isn't a program name in Rakudo"). Since there is a test in 
S02-magicals/progname.t I didn't add a second test for this specific occurence 
of the problem.

(My test would have been:)

# RT #112584
{
    use lib 't/spec/packages';
    use Test::Util;
    is_run 'use v6; sub MAIN (Str $bar) { }',
        {
            out => '',
            err => /Usage\: \s+ getout/,  ## temp script file starts with getout
        },
        :compiler-args['--stagestats'],
        'USAGE message contains script name when using compiler arg 
--stagestats';