Bazel: Add workspace-status-command script for other platform

Per default, Bazel is using tools/workspace-status.sh script to provide
used git version. This script cannot be used on the other platform. Add
another dummy platform specific script. This would allow us to add CI
build for other platform on ci.bazel.io. See these issues for more
background: [1], [2].

Note, that this Bazel fix is needed to build :headless on the other
platform: [3]:

  bazel build \
  --workspace_status_command=tools\workspace-status.cmd :headless

[1] https://github.com/bazelbuild/continuous-integration/issues/126
[2] https://github.com/bazelbuild/bazel/issues/3965
[3] https://github.com/bazelbuild/bazel/issues/3962

Change-Id: I29b4bd8c9f8b85e2ed7b8cb2546ff5f2979af0da
diff --git a/tools/workspace-status.cmd b/tools/workspace-status.cmd
new file mode 100644
index 0000000..4a3b88e
--- /dev/null
+++ b/tools/workspace-status.cmd
@@ -0,0 +1,2 @@
+echo STABLE_BUILD_GERRIT_LABEL dev
+echo STABLE_WORKSPACE_ROOT %cd%