/usr/lib/x86_64-linux-gnu/pkgconfig/kadm-client.pc is in libkrb5-dev 1.12+dfsg-2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/pkgconfig/mit-krb5/kadm-client.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/mit-krb5/kadm-client.pc