[tx-robot] updated from transifex

apps/files_external/l10n/te.php

apps/files_external/l10n/th_TH.php

apps/files_external/l10n/tr.php

apps/files_external/l10n/ug.php

apps/files_external/l10n/uk.php

apps/files_external/l10n/ur_PK.php

apps/files_external/l10n/vi.php

apps/files_external/l10n/zh_CN.php

apps/files_external/l10n/zh_HK.php

apps/files_external/l10n/zh_TW.php

apps/user_ldap/l10n/hi_IN.php

core/l10n/ar.php

core/l10n/hi_IN.php

l10n/af_ZA/core.po

l10n/af_ZA/files.po

l10n/af_ZA/files_external.po

l10n/af_ZA/files_sharing.po

l10n/af_ZA/settings.po

l10n/af_ZA/user_ldap.po

l10n/ar/core.po