/usr/share/doc/openjdk-8-jre-zero is in openjdk-8-jre-zero 8u77-b03-3ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/openjdk-8-jre-headless
/usr/share/doc/openjdk-8-jre-headless