update build deps to current Packaging Guidelines

libcmis.spec

@@ -11,9 +11,9 @@ URL: http://sourceforge.net/projects/libcmis/
 Source: http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.gz
 
 BuildRequires: boost-devel
-BuildRequires: cppunit-devel
-BuildRequires: libcurl-devel
-BuildRequires: libxml2-devel
+BuildRequires: pkgconfig(cppunit)
+BuildRequires: pkgconfig(libcurl)
+BuildRequires: pkgconfig(libxml-2.0)
 BuildRequires: xmlto
 
 Patch0: 0001-Fix-int-bool-confusion-on-big-endian-architectures.patch