package/opencv4: add CPE variables

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

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/opencv4/opencv4.mk

@@ -9,6 +9,8 @@ OPENCV4_SITE = $(call github,opencv,opencv,$(OPENCV4_VERSION))
 OPENCV4_INSTALL_STAGING = YES
 OPENCV4_LICENSE = Apache-2.0
 OPENCV4_LICENSE_FILES = LICENSE
+OPENCV4_CPE_ID_VENDOR = opencv
+OPENCV4_CPE_ID_PRODUCT = opencv
 OPENCV4_SUPPORTS_IN_SOURCE_BUILD = NO
 
 OPENCV4_CXXFLAGS = $(TARGET_CXXFLAGS)