Bug 12948: Use word indexing for language (MARC21)

Bug 12948: Use word indexing for language (MARC21)

 This patch is for MARC21. To test:
1)Setup a site with
 MARC21
2)Insert 2 record, one lang A in 041 and 008 pos
 35-37 an other with lang A in 041 and lang B in 008 pos
 35-37
3)Index them
4)Search in advanced search with filter
 'languare' for lan A. You will see 2 records
5)Search in
 advanced search with filter 'languare' for lan B. You will
 see 0 records
6)Apply the patch
7)Full reindex
8)Search in advanced search
 with filter 'languare' for lan B. You will see 1 records

http://bugs.koha-community.org/show_bug.cgi?id=12948

Signed-off-by: Magnus Enger <magnus@enger.priv.no>
I have *not* actually tested this, but the changes are identical to the ones
done for NORMARC, which I have tested, so I think it is safe to sign off. If
anyone disagrees, please reset the bug to "Needs signoff".

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit c29a53ea20d668f135c62abbc7dda1bf282be8f0)
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>