/usr/lib/x86_64-linux-gnu/gcj-5-16/libgcj_bc.so.1 is in libgcj16 5.3.1-14ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/gcj-5-16/../libgcj.so.16
/usr/lib/x86_64-linux-gnu/gcj-5-16/../libgcj.so.16