/usr/share/doc/libbladerf-dev/changelog.Debian.gz is in libbladerf-dev 0.2016.06-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libbladerf-dev/../libbladerf1/changelog.Debian.gz
/usr/share/doc/libbladerf-dev/../libbladerf1/changelog.Debian.gz