/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64/jndi-ldap.jar is in gcj-6-jdk 6.3.0-18+deb9u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64/jndi-ldap-1.5.0.0.jar