/usr/lib/x86_64-linux-gnu/liblastfm5.so is in liblastfm5-dev 1.0.9-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liblastfm5.so.1
/usr/lib/x86_64-linux-gnu/liblastfm5.so.1