/usr/lib/x86_64-linux-gnu/libflite.so is in flite1-dev 1.4-release-8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libflite.so.1
/usr/lib/x86_64-linux-gnu/libflite.so.1