package/perl: add PERL_CPE_ID_VENDOR

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

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/perl/perl.mk

@@ -11,6 +11,7 @@ PERL_SITE = https://www.cpan.org/src/5.0
 PERL_SOURCE = perl-$(PERL_VERSION).tar.xz
 PERL_LICENSE = Artistic or GPL-1.0+
 PERL_LICENSE_FILES = Artistic Copying README
+PERL_CPE_ID_VENDOR = perl
 PERL_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES)
 PERL_INSTALL_STAGING = YES