package/libcap-ng: set LIBCAP_NG_CPE_ID_VALID

cpe:2.3:a:libcap-ng_project:libcap-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%3Alibcap-ng_project%3Alibcap-ng

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

package/libcap-ng/libcap-ng.mk

@@ -8,6 +8,7 @@ LIBCAP_NG_VERSION = 0.8.2
 LIBCAP_NG_SITE = http://people.redhat.com/sgrubb/libcap-ng
 LIBCAP_NG_LICENSE = GPL-2.0+ (programs), LGPL-2.1+ (library)
 LIBCAP_NG_LICENSE_FILES = COPYING COPYING.LIB
+LIBCAP_NG_CPE_ID_VALID = YES
 LIBCAP_NG_INSTALL_STAGING = YES
 
 LIBCAP_NG_CONF_ENV = ac_cv_prog_swig_found=no