CONTRIBUTORS: add Michael Matloob

Change-Id: I11531432aaee8bab09f6b964b398f3faf0970a85
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/291589
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
1 file changed