[tx-robot] updated from transifex

apps/files/l10n/es_AR.php

apps/files_encryption/l10n/ar.php

apps/user_ldap/l10n/nl.php

apps/user_webdavauth/l10n/ar.php

apps/user_webdavauth/l10n/es_AR.php

apps/user_webdavauth/l10n/si_LK.php

apps/user_webdavauth/l10n/sv.php

core/l10n/de.php

core/l10n/de_DE.php

l10n/ar/files.po

l10n/ar/files_encryption.po

l10n/ar/user_webdavauth.po

l10n/bg_BG/files.po

l10n/ca/files.po

l10n/cs_CZ/files.po

l10n/da/files.po

l10n/de/core.po

l10n/de/files.po

l10n/de_DE/core.po

l10n/de_DE/files.po