/usr/lib/x86_64-linux-gnu/libcld2_dynamic.so is in libcld2-dev 0.0.0-git20150806-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcld2_dynamic.so.0
/usr/lib/x86_64-linux-gnu/libcld2_dynamic.so.0