package/thttpd: add THTTPD_CPE_ID_VENDOR

cpe:2.3:a:acme:thttpd is a valid CPE identifier for this package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/thttpd/thttpd.mk

@@ -8,6 +8,7 @@ THTTPD_VERSION = 2.29
 THTTPD_SITE = https://acme.com/software/thttpd
 THTTPD_LICENSE = BSD-2-Clause
 THTTPD_LICENSE_FILES = thttpd.c
+THTTPD_CPE_ID_VENDOR = acme
 
 THTTPD_MAKE = $(MAKE1)