swanmon: add version check override

Add a version check override script that verifies swanmon displays its
usage information, since swanmon does not provide version information.

Remove redundant test.sh.

Signed-off-by: Wei-Ting Yang <williamatcg@gmail.com>

utils/swanmon/test-version.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# shellcheck shell=busybox
+
+case "$PKG_NAME" in
+swanmon)
+	swanmon help 2>&1 | grep 'Usage: swanmon'
+	;;
+
+*)
+	echo "Untested package: $PKG_NAME" >&2
+	exit 1
+	;;
+esac

utils/swanmon/test.sh

@@ -1,3 +0,0 @@
-#!/bin/sh
-
-swanmon help