/usr/share/doc/qt4-qtconfig/LGPL_EXCEPTION.txt is in qt4-qtconfig 4:4.8.7+dfsg-7ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/qt4-qtconfig/../libqtcore4/LGPL_EXCEPTION.txt
/usr/share/doc/qt4-qtconfig/../libqtcore4/LGPL_EXCEPTION.txt