package/slirp: add CPE variables

cpe:2.3:a:libslirp_project:libslirp is a valid CPE identifier for this
package:

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

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

package/slirp/slirp.mk

@@ -11,6 +11,8 @@ SLIRP_SOURCE = libslirp-$(SLIRP_VERSION).tar.xz
 SLIRP_SITE = https://elmarco.fedorapeople.org
 SLIRP_LICENSE = BSD-3-Clause
 SLIRP_LICENSE_FILES = COPYRIGHT
+SLIRP_CPE_ID_VENDOR = libslirp_project
+SLIRP_CPE_ID_PRODUCT = libslirp
 SLIRP_INSTALL_STAGING = YES
 SLIRP_DEPENDENCIES = libglib2