/usr/share/qt4/bin/lrelease is in qt4-linguist-tools 4:4.8.1-0ubuntu4.9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/qt4/bin/../../../bin/lrelease-qt4
/usr/share/qt4/bin/../../../bin/lrelease-qt4