/usr/powerpc64le-linux-gnu/lib/libgomp.so.1 is in libgomp1-ppc64el-cross 4.8.2-16ubuntu4cross0.4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/powerpc64le-linux-gnu/lib/libgomp.so.1.0.0
/usr/powerpc64le-linux-gnu/lib/libgomp.so.1.0.0