package/webkitgtk: add WEBKITGTK_CPE_ID_VENDOR

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

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Reviewed-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/webkitgtk/webkitgtk.mk

@@ -12,6 +12,7 @@ WEBKITGTK_LICENSE = LGPL-2.1+, BSD-2-Clause
 WEBKITGTK_LICENSE_FILES = \
 	Source/WebCore/LICENSE-APPLE \
 	Source/WebCore/LICENSE-LGPL-2.1
+WEBKITGTK_CPE_ID_VENDOR = webkitgtk
 WEBKITGTK_DEPENDENCIES = host-ruby host-python host-gperf \
 	enchant harfbuzz icu jpeg libgcrypt libgtk3 libsecret libsoup \
 	libtasn1 libxml2 libxslt openjpeg sqlite webp woff2