A+C: add Mrunal Patel (Red Hat corporate CLA)

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/152010043

AUTHORS

@@ -360,6 +360,7 @@ Pietro Gagliardi <pietro10@mac.com>
 Preetam Jinka <pj@preet.am>
 Quan Yong Zhai <qyzhai@gmail.com>
 Raif S. Naffah <go@naffah-raif.name>
+Red Hat, Inc.
 Rémy Oudompheng <oudomphe@phare.normalesup.org>
 Richard Crowley <r@rcrowley.org>
 Richard Eric Gavaletz <gavaletz@gmail.com>

CONTRIBUTORS

@@ -437,6 +437,7 @@ Mikkel Krautz <mikkel@krautz.dk> <krautz@gmail.com>
 Miquel Sabaté Solà <mikisabate@gmail.com>
 Moriyoshi Koizumi <mozo@mozo.jp>
 Môshe van der Sterre <moshevds@gmail.com>
+Mrunal Patel <mrunalp@gmail.com>
 Nan Deng <monnand@gmail.com>
 Nathan John Youngman <nj@nathany.com>
 Nicholas Katsaros <nick@nickkatsaros.com>