/usr/share/doc/libqt4-dbus/LGPL_EXCEPTION.txt is in libqt4-dbus 4:4.8.7+dfsg-5ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libqt4-dbus/../libqtdbus4/LGPL_EXCEPTION.txt
/usr/share/doc/libqt4-dbus/../libqtdbus4/LGPL_EXCEPTION.txt