[tx-robot] updated from transifex

apps/files/l10n/hr.php

apps/files_encryption/l10n/es.php

apps/files_encryption/l10n/eu.php

apps/files_external/l10n/eu.php

apps/files_external/l10n/nb_NO.php

apps/files_external/l10n/nl.php

apps/files_sharing/l10n/eu.php

apps/files_sharing/l10n/sl.php

apps/files_versions/l10n/es.php

apps/files_versions/l10n/eu.php

apps/user_ldap/l10n/eu.php

core/l10n/de.php

core/l10n/el.php

core/l10n/et_EE.php

core/l10n/it.php

core/l10n/sl.php

core/l10n/sv.php

core/l10n/th_TH.php

l10n/af/core.po

l10n/ar/core.po