/usr/lib/x86_64-linux-gnu/libimobiledevice.so is in libimobiledevice-dev 1.2.1~git20171128.5a854327+dfsg-0.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libimobiledevice.so.6.0.0