package/flite: add FLITE_CPE_ID_VENDOR

cpe:2.3:a:cmu:flite is a valid identifier for
this package:
https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=flite

Signed-off-by: Clément Ramirez <clement.ramirez@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 144cacd07bd613bc4a293b8c0ec7c7304bdf8cc0)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/flite/flite.mk

@@ -8,6 +8,7 @@ FLITE_VERSION = 2.2
 FLITE_SITE = $(call github,festvox,flite,v$(FLITE_VERSION))
 FLITE_LICENSE = BSD-4-Clause
 FLITE_LICENSE_FILES = COPYING
+FLITE_CPE_ID_VENDOR = cmu
 
 FLITE_INSTALL_STAGING = YES
 # Patching configure.in