package/lightning: add LIGHTNING_CPE_ID_VENDOR

cpe:2.3:a:gnu:lightning:*:*:*:*:*:*:*:* is a valid CPE for this pkg

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

Signed-off-by: Matthew Weber <matthew.weber@collins.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit fe6767f7cd4b078f1e0c6699b75291810c16c150)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/lightning/lightning.mk

@@ -9,6 +9,7 @@ LIGHTNING_SITE = $(BR2_GNU_MIRROR)/lightning
 LIGHTNING_LICENSE = LGPL-3.0+
 LIGHTNING_LICENSE_FILES = COPYING.LESSER
 LIGHTNING_INSTALL_STAGING = YES
+LIGHTNING_CPE_ID_VENDOR = gnu
 # We're patching include/Makefile.am
 LIGHTNING_AUTORECONF = YES