Ticket 49552 - Fix the last of the build issues on F28/29
Description: Add missing NSPR/NSS libs for libsrvcore, and add libldaputil
to ns-slapd dependancies.
Thanks to Matus for figuring outthe ns-slapd dependacnies part!!
https://pagure.io/389-ds-base/issue/49552
Reviewed by: mreynolds & mhonek (one line commit rule)