package/cegui: disable Python SWIG extension modules unconditionally

It seems that Python SWIG extension module(s) are not compatible with
buildroot's SWIG version so disable them unconditionally to fix
the following build errors:

Fixes:
 - http://autobuild.buildroot.net/results/f80/f80ebdcbde08c13eddec9fadc39b9c2bd4b83e94//

  and more...

Signed-off-by: Bartosz Bilas <b.bilas@grinn-global.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/cegui/cegui.mk

@@ -16,7 +16,8 @@ CEGUI_CONF_OPTS = \
 	-DCEGUI_BUILD_XMLPARSER_XERCES=OFF \
 	-DCEGUI_USE_FRIBIDI=OFF \
 	-DCEGUI_SAMPLES_ENABLED=OFF \
-	-DCEGUI_BUILD_APPLICATION_TEMPLATES=OFF
+	-DCEGUI_BUILD_APPLICATION_TEMPLATES=OFF \
+	-DCEGUI_BUILD_PYTHON_MODULES_SWIG=OFF
 CEGUI_DEPENDENCIES = glm \
 	$(if $(BR2_PACKAGE_LIBGLFW),libglfw) \
 	$(if $(BR2_PACKAGE_HAS_LIBGL),libgl) \