package/hplip: add CPE variables

cpe:2.3:a:hp:linux_imaging_and_printing_project is a valid CPE
identifier for this package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 3c4cd280eb720b095efdf1bb78a502d246a5601a)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/hplip/hplip.mk

@@ -10,6 +10,8 @@ HPLIP_AUTORECONF = YES
 HPLIP_DEPENDENCIES = cups libusb jpeg host-pkgconf
 HPLIP_LICENSE = GPL-2.0, BSD-3-Clause, MIT
 HPLIP_LICENSE_FILES = COPYING
+HPLIP_CPE_ID_VENDOR = hp
+HPLIP_CPE_ID_PRODUCT = linux_imaging_and_printing_project
 
 HPLIP_CONF_OPTS = \
 	--disable-qt4 \