Bug 9358 - Followup - Fixed field plugins for MARC21 should be updated for MARC21...

Bug 9358 - Followup - Fixed field plugins for MARC21 should be updated for MARC21 update #15

This little patch adds a few values and descriptions to complete
value builder for marc21 008.

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Follow-up works as described.
XML change only.
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
(cherry picked from commit cb47df4bbbc676e29f75c1c686c9ba12e8e73b57)

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>