dbus-python: select pyexpat dependency

dbus-python requires xml.parsers.expat, which is provided by the pyexpat
module. This patch enables the pyexpat module as a dependency when dbus-python
is selected.

[Peter: fixup whitespace]
Signed-off-by: Ivan Sergeev <vsergeev@kumunetworks.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dbus-python/Config.in

@@ -5,6 +5,8 @@ config BR2_PACKAGE_DBUS_PYTHON
 	depends on BR2_PACKAGE_DBUS
 	depends on BR2_PACKAGE_PYTHON
 	select BR2_PACKAGE_DBUS_GLIB
+	# pyexpat: runtime dependency only
+	select BR2_PACKAGE_PYTHON_PYEXPAT
 	help
 	  Python bindings for D-Bus