/usr/share/doc/gdc-powerpc-linux-gnu/changelog.Debian.gz is in gdc-powerpc-linux-gnu 4:5.3.1-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gdc-powerpc-linux-gnu/../cpp-powerpc-linux-gnu/changelog.Debian.gz