package/gd: add CPE variables

cpe:2.3:a:libgd:libgd is a valid CPE identifier for this package:

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

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

package/gd/gd.mk

@@ -10,6 +10,8 @@ GD_SITE = https://github.com/libgd/libgd/releases/download/gd-$(GD_VERSION)
 GD_INSTALL_STAGING = YES
 GD_LICENSE = GD license
 GD_LICENSE_FILES = COPYING
+GD_CPE_ID_VENDOR = libgd
+GD_CPE_ID_PRODUCT = libgd
 GD_CONF_OPTS = --without-x --disable-rpath --disable-werror
 GD_DEPENDENCIES = host-pkgconf