This patch fixes the auditd rules template so that AppArmor and SELinux
policy modifications are logged, depending on which Linux distribution
is in use. The security_audit_apparmor_changes variable has been renamed
to security_audit_mac_changes to be more generic.
Documentation updates and a release note are included.
Closes-bug: 1584187
Change-Id: I0955e2cb8a05af4afd36aaca518322a9df6d1ff7