package/syslog-ng: add SYSLOG_NG_CPE_ID_VENDOR

cpe:2.3:a:oneidentity:syslog-ng is a valid CPE identifier for this
package:

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

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

package/syslog-ng/syslog-ng.mk

@@ -10,6 +10,7 @@ SYSLOG_NG_VERSION = 3.30.1
 SYSLOG_NG_SITE = https://github.com/balabit/syslog-ng/releases/download/syslog-ng-$(SYSLOG_NG_VERSION)
 SYSLOG_NG_LICENSE = LGPL-2.1+ (syslog-ng core), GPL-2.0+ (modules)
 SYSLOG_NG_LICENSE_FILES = COPYING GPL.txt LGPL.txt
+SYSLOG_NG_CPE_ID_VENDOR = oneidentity
 SYSLOG_NG_DEPENDENCIES = host-bison host-flex host-pkgconf \
 	libglib2 openssl pcre
 # We're patching configure.ac