package/librelp: add LIBRELP_CPE_ID_VENDOR

cpe:2.3:a:rsyslog:librelp is a valid CPE identifier for this package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 10f8934c59ed8201bf38e00a18425ca1f49dc045)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/librelp/librelp.mk

@@ -8,6 +8,7 @@ LIBRELP_VERSION = 1.9.0
 LIBRELP_SITE = http://download.rsyslog.com/librelp
 LIBRELP_LICENSE = GPL-3.0+
 LIBRELP_LICENSE_FILES = COPYING
+LIBRELP_CPE_ID_VENDOR = rsyslog
 LIBRELP_INSTALL_STAGING = YES
 
 ifeq ($(BR2_PACKAGE_GNUTLS),y)