Add test-aggregate-results.sh

This script aggregates test results using Sharness.

test/test-aggregate-results.sh

+#!/bin/sh
+#
+# Script to aggregate results using Sharness
+#
+# Copyright (c) 2014 Christian Couder
+# MIT Licensed; see the LICENSE file in this repository.
+#
+
+. ./test-sharness-config.sh
+
+SHARNESS_AGGREGATE="$SHARNESS_DIRECTORY/aggregate-results.sh"
+
+test -f "$SHARNESS_AGGREGATE" || {
+	echo >&2 "Cannot find: $SHARNESS_AGGREGATE"
+	echo >&2 "Please check Sharness installation."
+	exit 1
+}
+
+ls test-results/t*-*.sh.*.counts | "$SHARNESS_AGGREGATE"