package/privoxy: add PRIVOXY_CPE_ID_VENDOR

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

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

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

package/privoxy/privoxy.mk

@@ -12,5 +12,6 @@ PRIVOXY_AUTORECONF = YES
 PRIVOXY_DEPENDENCIES = pcre zlib
 PRIVOXY_LICENSE = GPL-2.0+
 PRIVOXY_LICENSE_FILES = LICENSE
+PRIVOXY_CPE_ID_VENDOR = privoxy
 
 $(eval $(autotools-package))