/usr/lib/gcc-cross/powerpc64le-linux-gnu/7/plugin/libcc1plugin.so is in gcc-7-powerpc64le-linux-gnu 7.3.0-16ubuntu3cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc-cross/powerpc64le-linux-gnu/7/plugin/libcc1plugin.so.0.0.0