package/bird: add BIRD_CPE_ID_VENDOR

cpe:2.3:a:nic:bird is a valid CPE identifier for this package:

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

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

package/bird/bird.mk

@@ -8,6 +8,7 @@ BIRD_VERSION = 2.0.7
 BIRD_SITE = ftp://bird.network.cz/pub/bird
 BIRD_LICENSE = GPL-2.0+
 BIRD_LICENSE_FILES = README
+BIRD_CPE_ID_VENDOR = nic
 BIRD_DEPENDENCIES = host-flex host-bison
 
 ifeq ($(BR2_PACKAGE_BIRD_CLIENT),y)