Revert "Delete WORKSPACE"

This reverts commit d96a7859e2898e6d8198dea3c2fae52da7f6ff8f.

Reason for revert: Apparently this broke drydocks bazel build, and we're not using rules_cros anymore anyway, so this doesn't affect alchemy anymore

Original change's description:
> Delete WORKSPACE
>
> This allows it to work with alchemy.
>
> Change-Id: Ic741a4431c63161e2c272becb6956e160ea0d3d2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/rules_cros/+/4190657
> Reviewed-by: George Burgess <gbiv@chromium.org>
> Tested-by: Matt Stark <msta@google.com>

Change-Id: Ieb4f2abe42db616d8e7372e04045275a8d52c3e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/rules_cros/+/4714167
Tested-by: Matt Stark <msta@google.com>
Reviewed-by: Andrew Moylan <amoylan@chromium.org>
Commit-Queue: Matt Stark <msta@google.com>
Auto-Submit: Matt Stark <msta@google.com>
diff --git a/WORKSPACE b/WORKSPACE
new file mode 100644
index 0000000..75664ff
--- /dev/null
+++ b/WORKSPACE
@@ -0,0 +1,9 @@
+# Copyright 2022 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+workspace(name = "rules_cros")
+
+load("//cros:repositories.bzl", "rules_cros_dependencies")
+
+rules_cros_dependencies()