package/giflib: set GIFLIB_CPE_ID_VALID

cpe:2.3:a:giflib_project:giflib is a valid CPE identifier for this
package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/giflib/giflib.mk

@@ -9,6 +9,7 @@ GIFLIB_SITE = http://downloads.sourceforge.net/project/giflib
 GIFLIB_INSTALL_STAGING = YES
 GIFLIB_LICENSE = MIT
 GIFLIB_LICENSE_FILES = COPYING
+GIFLIB_CPE_ID_VALID = YES
 
 ifeq ($(BR2_STATIC_LIBS),y)
 GIFLIB_BUILD_LIBS = static-lib