Fix linking order of libldaputil/libslapd

@tjaalton - is merging this in master branch all you need, or do you need other branches updated as well?

it's only for master, building 1.3.8.x works fine here

389-ds-base is moving from Pagure to Github. This means that new issues and pull requests
will be accepted only in 389-ds-base's github repository.

This pull request has been cloned to Github as issue and is available here:
- https://github.com/389ds/389-ds-base/issues/2876

If you want to continue to work on the PR, please navigate to the github issue,
download the patch from the attachments and file a new pull request.

Thank you for understanding. We apologize for all inconvenience.