/usr/share/doc/qtdeclarative5-accounts-plugin/changelog.Debian.gz is in qtdeclarative5-accounts-plugin 0.6+16.04.20151106-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/qtdeclarative5-accounts-plugin/../qml-module-ubuntu-onlineaccounts/changelog.Debian.gz