Log Message:
Update p5-Class-MOP from version 0.83 to version 0.84.

Pkgsrc changes:
- Adjust dependencies: no need for devel/p5-Sub-Identify and require at
least p5-Test-Exception>=0.27 for build (test really)

Upstream changes:
0.84 Tue, May 12, 2009
    * Makefile.PL
      - Depend on Text::Exception 0.27 to avoid failing tests ond old
        versions (rafl)

    * Class::MOP
      - Made is_class_loaded a little stricter. It was reporting that
        a class was loaded if it merely had an @ISA variable in its
        stash. Now it checks that the @ISA var has elements in it.
      - Deprecate in_global_destruction and subname re-exporting
        (perigrin & Sartak)

    * Class::MOP::Class
      - Explicitly use Devel::GlobalDestruction and Sub::Name
        (perigrin)

    * Class::MOP::Package
      - Disable prototype mismatch warnings for add_package_symbol.
        (Florian Ragwitz)