package/skopeo: set SKOPEO_CPE_ID_VALID

cpe:2.3:a:skopeo_project:skopeo is a valid CPE identifier for this
package:

  https://nvd.nist.gov/products/cpe/detail/D76885CE-0BE8-4012-A93F-F33A0C5D743E

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

package/skopeo/skopeo.mk

@@ -9,6 +9,7 @@ SKOPEO_SITE = $(call github,containers,skopeo,v$(SKOPEO_VERSION))
 
 SKOPEO_LICENSE = Apache-2.0
 SKOPEO_LICENSE_FILES = LICENSE
+SKOPEO_CPE_ID_VALID = YES
 
 HOST_SKOPEO_DEPENDENCIES = \
 	host-btrfs-progs \