perl compilation error regexp [patch]

[Kevin Ryde]

Perl can add a "during global destruction" to its error message output
in certain circumstances, eg. foo.pl below

        (in cleanup) something bad at foo.pl line 3 during global destruction.

It'd be nice for compilation-mode to recognise that:

2007-12-28  Kevin Ryde  <address@hidden>

        * progmodes/compile.el (compilation-error-regexp-alist-alist): For
        perl, allow "during global destruction" at end.  This comes out under
        "use warnings" in recent perl when breaking circular references during
        program or thread exit.

        * compilation.txt (perl): Add a "during global destruction" sample.

foo.pl
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compile.el.perl-glob.diff
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compilation.txt.perl-glob.diff
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