package/jhead: set JHEAD_CPE_ID_VALID

cpe:2.3:a:jhead_project:jhead is a valid CPE identifier for this
package:

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

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

package/jhead/jhead.mk

@@ -8,6 +8,7 @@ JHEAD_VERSION = 3.04
 JHEAD_SITE = http://www.sentex.net/~mwandel/jhead
 JHEAD_LICENSE = Public Domain
 JHEAD_LICENSE_FILES = readme.txt
+JHEAD_CPE_ID_VALID = YES
 
 define JHEAD_BUILD_CMDS
 	$(TARGET_MAKE_ENV) $(MAKE) $(TARGET_CONFIGURE_OPTS) -C $(@D)