package/mbedtls: add CPE variables

cpe:2.3:a:arm:mbed_tls is a valid CPE identifier for this package:

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

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

package/mbedtls/mbedtls.mk

@@ -12,6 +12,8 @@ MBEDTLS_CONF_OPTS = \
 MBEDTLS_INSTALL_STAGING = YES
 MBEDTLS_LICENSE = Apache-2.0
 MBEDTLS_LICENSE_FILES = apache-2.0.txt
+MBEDTLS_CPE_ID_VENDOR = arm
+MBEDTLS_CPE_ID_PRODUCT = mbed_tls
 
 # This is mandatory for hiawatha
 ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)