fix warnings like   td_thr_tls_get_addr.c:30: warning: `__used__' attribute ignored
fix warnings like
  td_thr_tls_get_addr.c:30: warning: `__used__' attribute ignored

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc