A+C: add Xiangdong JI (ARM corporate CLA)

Change-Id: Id8dd9279883717cdd85a05e249af469b246742b9
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/196199
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/AUTHORS b/AUTHORS
index da95a62..1e5fcfc 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -10,6 +10,7 @@
 
 Alexander Shopov <ash@kambanaria.org>
 Andrew Wilkins <axwalk@gmail.com>
+ARM Ltd.
 Atos Infogerance
 Baokun Lee <nototon@gmail.com>
 Ben Shi <powerman1st@163.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 1c197a7..d56d6f6 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -72,3 +72,4 @@
 Vinu Rajashekhar <vinutheraj@gmail.com>
 Vladimir Mezentsev <vladimir.mezentsev@oracle.com>
 Xia Bin <snyh@snyh.org>
+Xiangdong JI <xiangdong.ji@arm.com>