package/cups: add CUPS_CPE_ID_VENDOR

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

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

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

package/cups/cups.mk

@@ -9,6 +9,7 @@ CUPS_SOURCE = cups-$(CUPS_VERSION)-source.tar.gz
 CUPS_SITE = https://github.com/apple/cups/releases/download/v$(CUPS_VERSION)
 CUPS_LICENSE = Apache-2.0 with GPL-2.0/LGPL-2.0 exception
 CUPS_LICENSE_FILES = LICENSE NOTICE
+CUPS_CPE_ID_VENDOR = cups
 CUPS_INSTALL_STAGING = YES
 
 # Using autoconf, not autoheader, so we cannot use AUTORECONF = YES.