/usr/lib/linux-tools/3.13.0-139-lowlatency/perf is in linux-tools-3.13.0-139-lowlatency 3.13.0-139.188.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/3.13.0-139-lowlatency/../../linux-tools-3.13.0-139/perf