/usr/share/doc/libgsmme-dev/changelog.Debian.gz is in libgsmme-dev 1.10+20120414.gita5e5ae9a-0.3build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgsmme-dev/../libgsmme1v5/changelog.Debian.gz