package/x11r7/libXres: add CPE variables

cpe:2.3:a:x:libxres is a valid CPE identifier for this package:

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

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

package/x11r7/xlib_libXres/xlib_libXres.mk

@@ -9,6 +9,8 @@ XLIB_LIBXRES_SOURCE = libXres-$(XLIB_LIBXRES_VERSION).tar.bz2
 XLIB_LIBXRES_SITE = http://xorg.freedesktop.org/releases/individual/lib
 XLIB_LIBXRES_LICENSE = MIT
 XLIB_LIBXRES_LICENSE_FILES = COPYING
+XLIB_LIBXRES_CPE_ID_VENDOR = x
+XLIB_LIBXRES_CPE_ID_PRODUCT = libxres
 XLIB_LIBXRES_INSTALL_STAGING = YES
 XLIB_LIBXRES_DEPENDENCIES = xlib_libX11 xlib_libXext xorgproto
 XLIB_LIBXRES_CONF_OPTS = --disable-malloc0returnsnull