Better flock detection for autodie tests

Better flock detection for autodie tests

G'day p5p,

Craig A. Berry discovered that autodie's tests which attempt to detect
flock() support can cause bogus test failures on older VMS systems:

	https://rt.cpan.org/Ticket/Display.html?id=47812

Attached is a trivial patch from Craig that fixes this issue.  It's already
been applied to my upstream repository.

Dave - I have no idea if this would be an issue for people building Perl
5.10.1 on old VMS systems.  You may wish to consider it for inclusion into
maint-5.10 just in case.

All the very best,

	Paul

--
Paul Fenwick <pjf@perltraining.com.au> | http://perltraining.com.au/
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Signed-off-by: H.Merijn Brand <h.m.brand@xs4all.nl>