package/libcdio: add LIBCDIO_CPE_ID_VENDOR

cpe:2.3:a:gnu:libcdio is a valid CPE identifier for this package:

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

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

package/libcdio/libcdio.mk

@@ -10,6 +10,7 @@ LIBCDIO_SITE = $(BR2_GNU_MIRROR)/libcdio
 LIBCDIO_INSTALL_STAGING = YES
 LIBCDIO_LICENSE = GPL-3.0+
 LIBCDIO_LICENSE_FILES = COPYING
+LIBCDIO_CPE_ID_VENDOR = gnu
 LIBCDIO_CONF_OPTS = --disable-example-progs --disable-cddb
 
 ifeq ($(BR2_ENABLE_LOCALE),)