Add iossim testing tool for running iOS unit tests.

testing/iossim/RedirectStdout.sh

Index: testing/iossim/RedirectStdout.sh
diff --git a/testing/iossim/RedirectStdout.sh b/testing/iossim/RedirectStdout.sh
new file mode 100755
index 0000000000000000000000000000000000000000..384f0e7cf078e14d71e7d1c4b108a73dcbe8dc5b
--- /dev/null
+++ b/testing/iossim/RedirectStdout.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# This script executes the command given as the first argument and redirects
+# the command's stdout to the file given as the second argument.
+#
+# Usage: RedirectStdout.sh <command> <output file>
+#
+# Example: Write the text 'foo' to a file called out.txt:
+#   RedirectStdout.sh "echo foo" out.txt
+
+exec $1 > $2