package/mutt: add MUTT_CPE_ID_VENDOR

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

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

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

package/mutt/mutt.mk

@@ -8,6 +8,7 @@ MUTT_VERSION = 1.14.7
 MUTT_SITE = https://bitbucket.org/mutt/mutt/downloads
 MUTT_LICENSE = GPL-2.0+
 MUTT_LICENSE_FILES = GPL
+MUTT_CPE_ID_VENDOR = mutt
 MUTT_DEPENDENCIES = ncurses
 MUTT_CONF_OPTS = --disable-doc --disable-smtp