Bug 16573: fix linkid value on marc_subfield_structure

Bug 16573: fix linkid value on marc_subfield_structure

followup to previous patch.

This patch fixes linkid value. It was set to '', but
declared as tinyint.
Mysql < 5.7 replaced this with nearest right value, i.e 0
Mysql 5.7 gives error here.

Also some normalization, all lines with data begins with two tabs

To test:
On top of Bug 16572 and previous patch

1) Run webinstaller
2) Add mandatory values
3) There must be no problems on MySQL 5.7

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>