Add a wrapper for shellsheck

testing/run-shellsheck.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+set -uxa pipefail
+
+# Ignore SC2054 as it effectivly complains about qemu's syntax using commas
+# to separate elements that we group here in an array.
+# See https://www.shellcheck.net/wiki/SC2054.
+shellcheck --exclude=SC2054 --shell=bash ../control-vm.sh