Fix: Remove leftovers in manifest from Kerberos GUI removal

Builds were giving the following error:
--------------------------------------
.....
==== Validating manifests against proto area ====

Entries present in manifests but not proto area:
    dir group=bin mode=0755 owner=root path=usr/lib/krb5/ListResourceBundle
.....
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This fix completes the removal of the Kerberos GUI was started in fix #114 and the above error goes away.

Testing: Incremental build of illumos-core (full nightly was made the same day before that).