Bug 20648: Attribute option 'Display in check-out' should be renamed

Bug 20648: Attribute option 'Display in check-out' should be renamed

This patch rewords the 'Display in check-out' option in the patron
attribute policy

To test:

1) Apply patch
2) Go to /cgi-bin/koha/admin/patron-attr-types.pl?op=add_attribute_type
3) Check that the 8th line down has been renamed to "Display in patron's
brief information:"
4) Check the description of this same option has been changed to "Check
to show this attribute in the brief information panel in the patron's
record (staff client)."

Signed-off-by: Sally <sally.healey@cheshiresharedservices.gov.uk>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>