/usr/lib/x86_64-linux-gnu/libQtSystemInfo.so.1.2 is in libqtsysteminfo1 1.2.0-3+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libQtSystemInfo.so.1.2.0
/usr/lib/x86_64-linux-gnu/libQtSystemInfo.so.1.2.0