add PKG_CPE_ID ids to package and tools

CPE ids helps to tracks CVE in packages.
https://cpe.mitre.org/specification/

Thanks to swalker for CPE to package mapping and
keep tracking CVEs.

Acked-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>

package/network/utils/iptables/Makefile

@@ -22,6 +22,7 @@ PKG_FIXUP:=autoreconf
 PKG_INSTALL:=1
 PKG_BUILD_PARALLEL:=1
 PKG_LICENSE:=GPL-2.0
+PKG_CPE_ID:=cpe:/a:netfilter_core_team:iptables
 
 include $(INCLUDE_DIR)/package.mk
 ifeq ($(DUMP),)