Bug 31715: Add German translations for language descriptions
This adds the German translations for the different languages to
subtag_registry.sql that is used by all languages during installation.
* Apply patch
* Run database update
* Install de-DE and activate it for the OPAC
* Go to advanced search
* Look at the language pull down - it shows the languages in their
language and then translated to English
* Switch to German - verify the German translations are used now
There are 2-3 cases where the translation = name, so only name is shown.
* Drop your database, create your database
* Run the web installer
* Everything should complete without error and the language pull down
should look exactly the same and be translated
Signed-off-by: David Nind <david@davidnind.com> Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl> Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>