Add a codereview.settings file for openmax.

This enables uploading reviews from a checkout obtained through:
git clone https://chromium.googlesource.com/external/webrtc/deps/third_party/openmax

TBR=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/49779004
diff --git a/codereview.settings b/codereview.settings
new file mode 100644
index 0000000..97ee244
--- /dev/null
+++ b/codereview.settings
@@ -0,0 +1,5 @@
+CODE_REVIEW_SERVER: webrtc-codereview.appspot.com
+CC_LIST: webrtc-reviews@webrtc.org
+VIEW_VC: https://chromium.googlesource.com/external/webrtc/deps/third_party/openmax/+/
+TRY_ON_UPLOAD: False
+PROJECT: webrtc