package/python-django: add CPE variables

cpe:2.3:a:djangoproject:django is a valid CPE identifier for this
package:

  https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=cpe%3A2.3%3Aa%3Adjangoproject%3Adjango

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-django/python-django.mk

@@ -10,6 +10,8 @@ PYTHON_DJANGO_SOURCE = Django-$(PYTHON_DJANGO_VERSION).tar.gz
 PYTHON_DJANGO_SITE = https://files.pythonhosted.org/packages/32/e3/e7e9a9378321fdfc3eb55de151911dce968fa245d1f16d8c480c63ea4ed1
 PYTHON_DJANGO_LICENSE = BSD-3-Clause
 PYTHON_DJANGO_LICENSE_FILES = LICENSE
+PYTHON_DJANGO_CPE_ID_VENDOR = djangoproject
+PYTHON_DJANGO_CPE_ID_PRODUCT = django
 PYTHON_DJANGO_SETUP_TYPE = setuptools
 
 $(eval $(python-package))