build: fix building error when building without libvirtd

When I build libvirt without libvirtd, I receive some errors:
cp: cannot stat `/home/wency/rpmbuild/BUILDROOT/libvirt-0.8.6-1.el6.x86_64/etc/libvirt/qemu/networks/default.xml': No such file or directory

My build step:
# ./autogen.sh --without-libvirtd
# make dist
# rpmbuild --nodeps --define "_sourcedir `pwd`" --define "_without_libvirtd 1" -ba libvirt.spec

The reason is we disable network when we do not build libvirt daemon in configure.ac.
After fixing this bug, I build libvirt without libvirtd, I receive other errors:
RPM build errors:
    Installed (but unpackaged) file(s) found:
   /usr/share/doc/libvirt-0.8.6/html/32favicon.png
   /usr/share/doc/libvirt-0.8.6/html/api.html
..
Signed-off-by: NWen Congyang <wency@cn.fujitsu.com>

libvirt.spec.in

@@ -195,6 +195,12 @@
 %endif
 
 
+# there's no use compiling the network driver without
+# the libvirt daemon
+%if ! %{with_libvirtd}
+%define with_network 0
+%endif
+
 Summary: Library providing a simple virtualization API
 Name: libvirt
 Version: @VERSION@
@@ -677,6 +683,8 @@ rm -rf $RPM_BUILD_ROOT%{_datadir}/doc/libvirt-%{version}
 
 %if ! %{with_libvirtd}
 rm -rf $RPM_BUILD_ROOT%{_sysconfdir}/libvirt/nwfilter
+mv $RPM_BUILD_ROOT%{_datadir}/doc/libvirt-%{version}/html \
+   $RPM_BUILD_ROOT%{_datadir}/doc/libvirt-devel-%{version}/
 %endif
 
 %if ! %{with_qemu}