package/haproxy: add HAPROXY_CPE_ID_VENDOR

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

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/haproxy/haproxy.mk

@@ -9,6 +9,7 @@ HAPROXY_VERSION = $(HAPROXY_VERSION_MAJOR).6
 HAPROXY_SITE = http://www.haproxy.org/download/$(HAPROXY_VERSION_MAJOR)/src
 HAPROXY_LICENSE = GPL-2.0+ and LGPL-2.1+ with exceptions
 HAPROXY_LICENSE_FILES = LICENSE doc/lgpl.txt doc/gpl.txt
+HAPROXY_CPE_ID_VENDOR = haproxy
 
 HAPROXY_MAKE_OPTS = \
 	LD=$(TARGET_CC) \