package/msmtp: add MSMTP_CPE_ID_VENDOR

cpe:2.3:a:marlam:msmtp is a valid CPE identifier for this package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/msmtp/msmtp.mk

@@ -11,6 +11,7 @@ MSMTP_DEPENDENCIES = host-pkgconf
 MSMTP_CONF_OPTS = --disable-gai-idn
 MSMTP_LICENSE = GPL-3.0+
 MSMTP_LICENSE_FILES = COPYING
+MSMTP_CPE_ID_VENDOR = marlam
 
 # msmtpd needs fork
 ifeq ($(BR2_USE_MMU),y)