/usr/share/doc/libonline-accounts-client-dev/changelog.Debian.gz is in libonline-accounts-client-dev 0.3+14.04.20140328-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libonline-accounts-client-dev/../libonline-accounts-client1/changelog.Debian.gz