[freeipa PR#3605][opened] [Backport][ipa-4-8] Replace %{_libdir} macro in BuildRequires

[fcami]

   URL: https://github.com/freeipa/freeipa/pull/3605
Author: fcami
 Title: #3605: [Backport][ipa-4-8] Replace %{_libdir} macro in BuildRequires
Action: opened

PR body:
"""
This PR was opened automatically because PR #3601 was pushed to master and backport to
ipa-4-8 is required.
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/3605/head:pr3605
git checkout pr3605