package/belle-sip: add BELLE_SIP_CPE_ID_VENDOR

cpe:2.3:a:linphone:belle-sip is a valid CPE identifier for this package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/belle-sip/belle-sip.mk

@@ -9,6 +9,7 @@ BELLE_SIP_SITE = \
 	https://gitlab.linphone.org/BC/public/belle-sip/-/archive/$(BELLE_SIP_VERSION)
 BELLE_SIP_LICENSE = GPL-3.0+
 BELLE_SIP_LICENSE_FILES = LICENSE.txt
+BELLE_SIP_CPE_ID_VENDOR = linphone
 BELLE_SIP_INSTALL_STAGING = YES
 BELLE_SIP_DEPENDENCIES = \
 	bctoolbox \