package/libkrb5: add CPE variables

cpe:2.3:a:mit:kerberos_5 is a valid CPE identifier for this package:

  https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=cpe%3A2.3%3Aa%3Amit%3Akerberos_5

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

package/libkrb5/libkrb5.mk

@@ -11,6 +11,8 @@ LIBKRB5_SOURCE = krb5-$(LIBKRB5_VERSION).tar.gz
 LIBKRB5_SUBDIR = src
 LIBKRB5_LICENSE = MIT
 LIBKRB5_LICENSE_FILES = NOTICE
+LIBKRB5_CPE_ID_VENDOR = mit
+LIBKRB5_CPE_ID_PRODUCT = kerberos_5
 LIBKRB5_DEPENDENCIES = host-bison $(TARGET_NLS_DEPENDENCIES)
 LIBKRB5_INSTALL_STAGING = YES