/usr/lib/x86_64-linux-gnu/libglib-2.0.so is in libglib2.0-dev 2.42.1-1+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libglib-2.0.so.0
/lib/x86_64-linux-gnu/libglib-2.0.so.0