package/python-rsa: add PYTHON_RSA_CPE_ID_VENDOR

cpe:2.3:a:python-rsa_project:python-rsa is a valid CPE identifier for
this package:

  https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=cpe%3A2.3%3Aa%3Apython-rsa_project%3Apython-rsa

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/python-rsa/python-rsa.mk

@@ -10,5 +10,6 @@ PYTHON_RSA_SITE = https://files.pythonhosted.org/packages/db/b5/475c45a58650b058
 PYTHON_RSA_SETUP_TYPE = setuptools
 PYTHON_RSA_LICENSE = Apache-2.0
 PYTHON_RSA_LICENSE_FILES = LICENSE
+PYTHON_RSA_CPE_ID_VENDOR = python-rsa_project
 
 $(eval $(python-package))