/usr/lib/x86_64-linux-gnu/libdbusmenu-qt.so is in libdbusmenu-qt-dev 0.9.3+16.04.20160218-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdbusmenu-qt.so.2
/usr/lib/x86_64-linux-gnu/libdbusmenu-qt.so.2