build fixes for rpm

mrw-c++.spec.in

@@ -5,12 +5,12 @@ Release: 1
 License: LGPL
 Group: Development/Libraries/C++
 Source0: %{name}-%{version}.tar.gz
-BuildRequires: pkg-config, subversion, automake, autoconf, doxygen, graphviz
+BuildRequires: subversion, automake, autoconf, doxygen, graphviz
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
 %if 0%{?fedora} || 0%{?rhel_version} || 0%{?centos_version}
-BuildRequires: cppunit-devel, mscgen, redhat-lsb
+BuildRequires: pkgconfig, cppunit-devel, mscgen, redhat-lsb
 %else%if 0%{?suse_version} || 0%{?sles_version}
-BuildRequires: libcppunit-devel, lsb-release
+BuildRequires: pkg-config, libcppunit-devel, lsb-release
 %endif%endif
 
 %description