/usr/share/doc/libclc-amdgcn/changelog.Debian.gz is in libclc-amdgcn 0.2.0+git20150813-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libclc-amdgcn/../libclc-dev/changelog.Debian.gz
/usr/share/doc/libclc-amdgcn/../libclc-dev/changelog.Debian.gz