package/sofia-sip: add SOFIA_SIP_CPE_ID_VENDOR

cpe:2.3:a:signalwire:sofia-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%3Asignalwire%3Asofia-sip

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

package/sofia-sip/sofia-sip.mk

@@ -10,6 +10,7 @@ SOFIA_SIP_INSTALL_STAGING = YES
 SOFIA_SIP_DEPENDENCIES = host-pkgconf
 SOFIA_SIP_LICENSE = LGPL-2.1+
 SOFIA_SIP_LICENSE_FILES = COPYING COPYRIGHTS
+SOFIA_SIP_CPE_ID_VENDOR = signalwire
 SOFIA_SIP_CONF_OPTS = --with-doxygen=no
 
 ifeq ($(BR2_PACKAGE_LIBGLIB2),y)