add BR: systemd-units for the _unitdir macro as recommended by

https://fedoraproject.org/wiki/Packaging:Guidelines:Systemd#Filesystem_locations

libcgroup.spec

@@ -4,7 +4,7 @@
 Summary: Library to control and monitor control groups
 Name: libcgroup
 Version: 0.38
-Release: 5%{?dist}
+Release: 6%{?dist}
 License: LGPLv2+
 Group: Development/Libraries
 URL: http://libcg.sourceforge.net/
@@ -15,7 +15,7 @@ Source3: cgred.sysconfig
 
 Patch0: fedora-config.patch
 
-BuildRequires: byacc, coreutils, flex, pam-devel
+BuildRequires: byacc, coreutils, flex, pam-devel, systemd-units
 Requires(pre): shadow-utils
 Requires(post): systemd
 Requires(preun): systemd
@@ -153,6 +153,9 @@ getent group cgred >/dev/null || groupadd -r cgred
 %{_libdir}/pkgconfig/libcgroup.pc
 
 %changelog
+* Thu Jul 18 2013 Karsten Hopp <karsten@redhat.com> 0.38-6
+- add BR: systemd-units
+
 * Tue Jul 09 2013 Karsten Hopp <karsten@redhat.com> 0.38-5
 - bump release and rebuild to fix some dependencies on PPC