add codereview.settings

Enables users with depot_tools to use 'git cl upload'

Change-Id: Id380ea2f9134cfe8bc60eb96a5e39a3ab8bdf841
diff --git a/codereview.settings b/codereview.settings
new file mode 100644
index 0000000..ccba2ee
--- /dev/null
+++ b/codereview.settings
@@ -0,0 +1,4 @@
+# This file is used by git cl to get repository specific information.
+GERRIT_HOST: True
+CODE_REVIEW_SERVER: chromium-review.googlesource.com
+GERRIT_SQUASH_UPLOADS: False