update build deps to Packaging Guidelines

libe-book.spec

@@ -11,14 +11,14 @@ URL: https://sourceforge.net/projects/libebook/
 Source: http://downloads.sourceforge.net/libebook/%{name}-%{version}.tar.xz
 
 BuildRequires: boost-devel
-BuildRequires: cppunit-devel
 BuildRequires: doxygen
 BuildRequires: gperf
 BuildRequires: help2man
-BuildRequires: libicu-devel
+BuildRequires: pkgconfig(cppunit)
-BuildRequires: libwpd-devel
+BuildRequires: pkgconfig(icu-i18n)
-BuildRequires: libxml2-devel
+BuildRequires: pkgconfig(libwpd-0.9)
-BuildRequires: zlib-devel
+BuildRequires: pkgconfig(libxml-2.0)
+BuildRequires: pkgconfig(zlib)
 
 %description
 %{name} is a library for import of non-HTML reflowable e-book formats.