package/oniguruma: set ONIGURUMA_CPE_ID_VALID

cpe:2.3:a:oniguruma_project:oniguruma is a valid CPE identifier for this
package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/oniguruma/oniguruma.mk

@@ -10,6 +10,7 @@ ONIGURUMA_SITE = \
 ONIGURUMA_SOURCE = onig-$(ONIGURUMA_VERSION).tar.gz
 ONIGURUMA_LICENSE = BSD-2-Clause
 ONIGURUMA_LICENSE_FILES = COPYING
+ONIGURUMA_CPE_ID_VALID = YES
 ONIGURUMA_INSTALL_STAGING = YES
 
 $(eval $(autotools-package))