/usr/lib/x86_64-linux-gnu/libtinyxml2.so is in libtinyxml2-dev 0~git20120518.1.a2ae54e-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libtinyxml2.so.0.0.0
/usr/lib/x86_64-linux-gnu/libtinyxml2.so.0.0.0