package/znc: add ZNC_CPE_ID_VENDOR

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

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

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

package/znc/znc.mk

@@ -8,6 +8,7 @@ ZNC_VERSION = 1.8.2
 ZNC_SITE = http://znc.in/releases/archive
 ZNC_LICENSE = Apache-2.0
 ZNC_LICENSE_FILES = LICENSE
+ZNC_CPE_ID_VENDOR = znc
 ZNC_DEPENDENCIES = host-pkgconf
 ZNC_CONF_OPTS = -DWANT_CYRUS=OFF -DWANT_I18N=OFF -DWANT_PERL=OFF