term: add codereview.cfg
term: add codereview.cfg

This will let git codereview rewrite issue references to the golang/go
repo. See https://golang.org/cl/4131 for details.

Change-Id: I5d5871b8570cdd448949a5a984027f909ab521a5
Reviewed-on: https://go-review.googlesource.com/c/term/+/352590
Trust: Tobias Klauser <0a68dd4915066ec5d3f81f75a828fee53dcc8822@gmail.com>
Run-TryBot: Tobias Klauser <0a68dd4915066ec5d3f81f75a828fee53dcc8822@gmail.com>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/term