package/squid: add SQUID_CPE_ID_VENDOR

cpe:2.3:a:squid-cache:squid is a valid CPE identifier for this package:

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

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

package/squid/squid.mk

@@ -9,6 +9,7 @@ SQUID_SOURCE = squid-$(SQUID_VERSION).tar.xz
 SQUID_SITE = http://www.squid-cache.org/Versions/v4
 SQUID_LICENSE = GPL-2.0+
 SQUID_LICENSE_FILES = COPYING
+SQUID_CPE_ID_VENDOR = squid-cache
 SQUID_DEPENDENCIES = libcap host-libcap libxml2 host-pkgconf \
 	$(if $(BR2_PACKAGE_LIBNETFILTER_CONNTRACK),libnetfilter_conntrack)
 SQUID_CONF_ENV = \