/usr/share/doc/libspeex-dev/changelog.Debian.gz is in libspeex-dev 1.2~rc1.2-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libspeex-dev/../libspeex1/changelog.Debian.gz
/usr/share/doc/libspeex-dev/../libspeex1/changelog.Debian.gz