/usr/src/linux-headers-4.4.0-93-lowlatency/tools is in linux-headers-4.4.0-93-lowlatency 4.4.0-93.116~14.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/src/linux-headers-4.4.0-93-lowlatency/../linux-headers-4.4.0-93/tools