/usr/arm-linux-gnueabi/lib/debug/libstdc++.so is in libstdc++6-4.7-dbg-armel-cross 4.7.4-3ubuntu12cross3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/arm-linux-gnueabi/lib/debug/libstdc++.so.6.0.17