package/jansson: add JANSSON_CPE_ID_VALID

cpe:2.3:a:jansson_project:jansson is a valid CPE identifier for this
package:

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

Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/jansson/jansson.mk

@@ -8,6 +8,7 @@ JANSSON_VERSION = 2.13.1
 JANSSON_SITE = http://www.digip.org/jansson/releases
 JANSSON_LICENSE = MIT
 JANSSON_LICENSE_FILES = LICENSE
+JANSSON_CPE_ID_VALID = YES
 JANSSON_INSTALL_STAGING = YES
 JANSSON_CONF_ENV = LIBS="-lm"