Fix underlinking in KDM
Review Request #104492 - Created April 5, 2012 and submitted
When using the gold linker, building KDM with kerberos support fails due to underlinking: kdm/backend/krb5auth.c requires error_message() from libcom_err. This patch adds a check for the library and passes it for linking when necessary.
Local compilation without issues, both with and without kerberos support enabled.