/usr/powerpc-linux-gnu/lib/libstdc++.so.6 is in libstdc++6-powerpc-cross 6.3.0-18cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/powerpc-linux-gnu/lib/libstdc++.so.6.0.22
/usr/powerpc-linux-gnu/lib/libstdc++.so.6.0.22