package/libao: add LIBAO_CPE_ID_VENDOR

cpe:2.3:a:xiph:libao is a valid CPE identifier for this package:

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

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
diff --git a/package/libao/libao.mk b/package/libao/libao.mk
index 501ea0c..19a4c16 100644
--- a/package/libao/libao.mk
+++ b/package/libao/libao.mk
@@ -10,6 +10,7 @@
 LIBAO_INSTALL_STAGING = YES
 LIBAO_LICENSE = GPL-2.0+
 LIBAO_LICENSE_FILES = COPYING
+LIBAO_CPE_ID_VENDOR = xiph
 LIBAO_CONF_OPTS = \
 	--disable-esd \
 	--disable-wmm \