Avoid repeated emails on tor failure

src/freedombone-utils-onion

       echo '    fi';
       echo '    exit 0';
       echo 'fi';
-      echo "tail -n 3 /var/log/tor/notices.log | mail -s \"[${PROJECT_NAME}] Tor status is \$status\" \$ADMIN_USER@\$HOSTNAME";
       echo 'if [ ! -f /tmp/.torfailed ]; then';
+      echo "    tail -n 3 /var/log/tor/notices.log | mail -s \"[${PROJECT_NAME}] Tor status is \$status\" \$ADMIN_USER@\$HOSTNAME";
       echo '    touch /tmp/.torfailed';
       echo 'fi'; } > /usr/bin/check_tor_health
     chmod +x /usr/bin/check_tor_health