/usr/powerpc-linux-gnu/lib64/libnss_files.so.2 is in libc6-ppc64-powerpc-cross 2.19-0ubuntu2cross1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/powerpc-linux-gnu/lib64/libnss_files-2.19.so
/usr/powerpc-linux-gnu/lib64/libnss_files-2.19.so