package/libbpf: add LIBBPF_CPE_ID_VENDOR

cpe:2.3:a:libbpf_project:libbpf is a valid CPE identifier for this
package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/libbpf/libbpf.mk

@@ -8,6 +8,7 @@ LIBBPF_VERSION = 0.6.1
 LIBBPF_SITE = $(call github,libbpf,libbpf,v$(LIBBPF_VERSION))
 LIBBPF_LICENSE = GPL-2.0, LGPL-2.1, BSD-2-Clause
 LIBBPF_LICENSE_FILES = LICENSE LICENSE.BSD-2-Clause LICENSE.LGPL-2.1
+LIBBPF_CPE_ID_VENDOR = libbpf_project
 LIBBPF_DEPENDENCIES = host-bison host-flex host-pkgconf elfutils zlib
 LIBBPF_INSTALL_STAGING = YES