alsa-lib: add test.sh for aserver without --version

aserver does not implement --version so the generic CI version check
fails for it. Add a test.sh case that verifies it is present and
executable instead.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

libs/alsa-lib/test.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+case "$1" in
+	aserver)
+		# aserver does not implement --version; just verify it is present
+		[ -x /usr/bin/aserver ] || exit 1
+		;;
+esac