package/libnet: add LIBNET_CPE_ID_VENDOR

cpe:2.3:a:libnet_project:libnet is a valid CPE identifier for this package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 135bae2163c96a3d5d1c419ad737b1b5ae93f61f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libnet/libnet.mk

@@ -11,5 +11,6 @@ LIBNET_INSTALL_STAGING = YES
 LIBNET_CONF_OPTS = libnet_cv_have_packet_socket=yes
 LIBNET_LICENSE = BSD-2-Clause, BSD-3-Clause
 LIBNET_LICENSE_FILES = doc/COPYING
+LIBNET_CPE_ID_VENDOR = libnet_project
 
 $(eval $(autotools-package))