package/firewalld: add FIREWALLD_CPE_ID_VENDOR

cpe:2.3:a:firewalld:firewalld is a valid CPE identifier for this
package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/firewalld/firewalld.mk

@@ -8,6 +8,7 @@ FIREWALLD_VERSION = 1.3.2
 FIREWALLD_SITE = $(call github,firewalld,firewalld,v$(FIREWALLD_VERSION))
 FIREWALLD_LICENSE = GPL-2.0
 FIREWALLD_LICENSE_FILES = COPYING
+FIREWALLD_CPE_ID_VENDOR = firewalld
 FIREWALLD_AUTORECONF = YES
 
 FIREWALLD_DEPENDENCIES = \