package/lftp: set LFTP_CPE_ID_VALID

cpe:2.3:a:lftp_project:lftp is a valid CPE identifier for this package:

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

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

package/lftp/lftp.mk

@@ -9,6 +9,7 @@ LFTP_SOURCE = lftp-$(LFTP_VERSION).tar.xz
 LFTP_SITE = http://lftp.yar.ru/ftp
 LFTP_LICENSE = GPL-3.0+
 LFTP_LICENSE_FILES = COPYING
+LFTP_CPE_ID_VALID = YES
 LFTP_DEPENDENCIES = readline zlib host-pkgconf
 
 # Help lftp finding readline and zlib