fix: call subs installed through a typeglob in bareword print arguments

[fglock]

Summary

A subroutine installed through a typeglob assignment at runtime is not invoked
when it is the first argument of an unparenthesized print call.

Reproducer

no strict 'refs';
*bar = sub { 'glob-installed' };
print bar(), "\n";

Expected behavior

Perl 5.42 prints:

glob-installed

Actual behavior

Both PerlOnJava backends exit successfully but print only the newline.

Investigation notes

The typeglob assignment does install a callable subroutine. The following
forms work in both backends:

my $value = bar();
print $value, "\n";

my $name = 'bar';
print &$name(), "\n";

print 'prefix=', bar(), "\n";

The failure is therefore not general dynamic-sub lookup. It is a narrow
parse/emission problem for the bareword call as the leading argument of the
unparenthesized print form. PerlOnJava also rejects the otherwise valid
parenthesized spelling print(bar(), "\n") with a syntax error, which may be
related.

Impact

This breaks runtime method/function registration patterns used by plugin
systems, DSLs, generated code, and legacy Perl that installs subs by glob
assignment. The silent empty result is more hazardous than a compile-time
failure.

Acceptance criteria

• The reproducer prints glob-installed on both backends.
• The parenthesized print(bar(), "\\n") spelling is accepted and has the
  same result as Perl.
• Preserve dynamic lookup: a sub installed after compilation must remain
  callable at the call site.