4.4.0-72.93) is not available, but a newer one is (4.4.0-142.168). We redirected you there.
/usr/lib/linux-tools/3.19.0-59-generic/perf is in linux-tools-3.19.0-59-generic 3.19.0-59.66~14.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/3.19.0-59-generic/../../linux-lts-vivid-tools-3.19.0-59/perf