/usr/share/doc/libopenvg1-mesa-lts-trusty-dbg/changelog.Debian.gz is in libopenvg1-mesa-lts-trusty-dbg 10.1.3-0ubuntu0.2~precise2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libopenvg1-mesa-lts-trusty-dbg/../libopenvg1-mesa-lts-trusty/changelog.Debian.gz