package/musl: add MUSL_CPE_ID_VENDOR

cpe:2.3:a:musl-libc:musl is a valid CPE identifier for this package:

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

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

package/musl/musl.mk

@@ -8,6 +8,7 @@ MUSL_VERSION = 1.2.2
 MUSL_SITE = http://www.musl-libc.org/releases
 MUSL_LICENSE = MIT
 MUSL_LICENSE_FILES = COPYRIGHT
+MUSL_CPE_ID_VENDOR = musl-libc
 
 # Before musl is configured, we must have the first stage
 # cross-compiler and the kernel headers