codereview.cfg: add codereview.cfg for master branch

The codereview sync-branch command wants all involved
branches to have codereview.cfg, and this will help us when
we transition from master to main later this year.

Change-Id: Ia8e4c8b8c86864ed9d730e5d96be1ff386e2e1cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/294291
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>

diff --git a/codereview.cfg b/codereview.cfg
new file mode 100644 (file)
index 0000000..77a74f1
--- /dev/null
+++ b/codereview.cfg
@@ -0,0 +1 @@
+branch: master