/usr/share/doc/gstreamer0.10-tools/changelog.Debian.gz is in gstreamer0.10-tools 0.10.36-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gstreamer0.10-tools/../libgstreamer0.10-0/changelog.Debian.gz