test: shell, lang: core: embedded: provisioner: Check it compiles

Add a test to guarantee we continue to keep compiling, in case something
in the language changes.

test/shell/embedded-provisioner.sh

@@ -0,0 +1,19 @@
+#!/bin/bash -e
+
+. "$(dirname "$0")/../util.sh"
+
+# misc bash functions, eg: repeat "#" 42
+function repeat() {
+	for ((i=0; i<$2; ++i)); do echo -n "$1"; done
+	echo
+}
+
+set -x
+
+# run unification with a dummy password
+$TIMEOUT "$MGMT" provisioner --only-unify --password $(repeat "#" 106) &
+pid=$!
+wait $pid	# get exit status
+e=$?
+
+exit $e