Add a codereview.settings file.

With this, `git cl upload` will do the right thing for boringssl.

BUG=none
Change-Id: Icc83144ef39bc71c795c411e608e0b8c009f3a04
Reviewed-on: https://boringssl-review.googlesource.com/2331
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>

codereview.settings

diff --git a/codereview.settings b/codereview.settings
new file mode 100644
index 0000000..1e123a1
--- /dev/null
+++ b/codereview.settings
@@ -0,0 +1,4 @@
+# This file is used by gcl to get repository specific information.
+GERRIT_HOST: True
+GERRIT_PORT: True
+CODE_REVIEW_SERVER: https://boringssl-review.googlesource.com