package/c-ares: add C_ARES_CPE_ID_VENDOR

cpe:2.3:a:c-ares_project:c-ares is a valid CPE identifier for this
package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 2990d7dcb163a5618100a6985726b6820457a6d1)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/c-ares/c-ares.mk

@@ -10,6 +10,7 @@ C_ARES_INSTALL_STAGING = YES
 C_ARES_CONF_OPTS = --with-random=/dev/urandom
 C_ARES_LICENSE = MIT
 C_ARES_LICENSE_FILES = LICENSE.md
+C_ARES_CPE_ID_VENDOR = c-ares_project
 # We're patching configure.ac
 C_ARES_AUTORECONF = YES