C+A: add Mike Rosset (individual CLA)

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4963047

AUTHORS

@@ -110,6 +110,7 @@ Michael Elkins <michael.elkins@gmail.com>
 Michael Hoisie <hoisie@gmail.com>
 Miek Gieben <miek@miek.nl>
 Mikael Tillenius <mikti42@gmail.com>
+Mike Rosset <mike.rosset@gmail.com>
 Mikio Hara <mikioh.mikioh@gmail.com>
 Mikkel Krautz <mikkel@krautz.dk>
 Moriyoshi Koizumi <mozo@mozo.jp>

CONTRIBUTORS

@@ -170,6 +170,7 @@ Michael Hoisie <hoisie@gmail.com>
 Michael T. Jones <mtj@google.com> <michael.jones@gmail.com>
 Miek Gieben <miek@miek.nl> <remigius.gieben@gmail.com>
 Mikael Tillenius <mikti42@gmail.com>
+Mike Rosset <mike.rosset@gmail.com>
 Mike Samuel <mikesamuel@gmail.com>
 Mike Solomon <msolo@gmail.com>
 Mikio Hara <mikioh.mikioh@gmail.com>