/usr/lib/x86_64-linux-gnu/gcj-4.9-15/libgcj_bc.so.1 is in libgcj15 4.9.2-10+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/gcj-4.9-15/../libgcj.so.15
/usr/lib/x86_64-linux-gnu/gcj-4.9-15/../libgcj.so.15