[tx-robot] updated from transifex

apps/files/l10n/es_AR.php

apps/files/l10n/ru.php

apps/files_encryption/l10n/ca.php

apps/files_encryption/l10n/cs_CZ.php

apps/files_encryption/l10n/es.php

apps/files_encryption/l10n/it.php

apps/files_encryption/l10n/lv.php

apps/files_encryption/l10n/sv.php

apps/files_sharing/l10n/sr.php

apps/files_trashbin/l10n/sv.php

apps/user_ldap/l10n/es_AR.php

core/l10n/ru.php

l10n/af_ZA/core.po

l10n/af_ZA/files.po

l10n/af_ZA/files_trashbin.po

l10n/af_ZA/settings.po

l10n/ar/core.po

l10n/ar/files.po

l10n/ar/files_trashbin.po

l10n/ar/settings.po