Bug 8750 - Chronological terms authorities not correctly indexed (trivial fix)

Bug 8750 - Chronological terms authorities not correctly indexed (trivial fix)

Patch re-done so it applies, had that double-utf8 problem

There was no entry in authority's record.abs for indexing chronological
terms. They couldn't be searched and (obviously) linked.

I've added those entries using the index names defined in
authorities/etc/bib1.att

Regards
To+

Sponsored-by: Universidad Nacional de Córdoba
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Passed-QA-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>