Relax libldb BuildRequires

Originally, we tried to stay on the safe side with libldb since it never
really commited to stable ABI or API, but since there were never any
issues in many years, it's safe to relax the requirement.

This change will benefit especially the storage developers who often
need a different (typically newer) libldb version and would like to
avoid to rebuild sssd for no reason.

sssd.spec

@@ -27,7 +27,7 @@
 
 Name: sssd
 Version: 1.12.4
-Release: 2%{?dist}
+Release: 3%{?dist}
 Group: Applications/System
 Summary: System Security Services Daemon
 License: GPLv3+
@@ -81,8 +81,7 @@ BuildRequires: libtalloc-devel
 BuildRequires: libtevent-devel
 BuildRequires: libtdb-devel
 
-# LDB needs a strict version match to build
-BuildRequires: libldb-devel = %{ldb_version}
+BuildRequires: libldb-devel >= %{ldb_version}
 BuildRequires: libdhash-devel >= 0.4.2
 BuildRequires: libcollection-devel
 BuildRequires: libini_config-devel >= 1.1
@@ -1024,6 +1023,9 @@ if [ $1 -eq 0 ]; then
 fi
 
 %changelog
+* Fri Mar  6 2015 Jakub Hrozek <jhrozek@redhat.com> - 1.12.4-3
+- Relax libldb BuildRequires to be greater-or-equal
+
 * Wed Feb 25 2015 Lukas Slebodnik <lslebodn@redhat.com> - 1.12.4-2
 - Add support for python3 bindings
 - Add requirement to python3 or python3 bindings