/usr/src/linux-headers-3.19.0-79-lowlatency/security is in linux-headers-3.19.0-79-lowlatency 3.19.0-79.87~14.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/src/linux-headers-3.19.0-79-lowlatency/../linux-headers-3.19.0-79/security