CONTRIBUTORS: add Tony Reix (ATOS corporate CLA)

Change-Id: I278e09737ab7a804a1964a4995ed29197bb25fee
Reviewed-on: https://go-review.googlesource.com/54392
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 264751a..fa38084 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -57,6 +57,7 @@
 Shenghou Ma <minux@golang.org> <minux.ma@gmail.com>
 Tim Shen <timshen@google.com>
 Than McIntosh <thanm@google.com>
+Tony Reix <tony.reix@bull.net>
 Uros Bizjak <ubizjak@gmail.com>
 Vinu Rajashekhar <vinutheraj@gmail.com>
 Vladimir Mezentsev <vladimir.mezentsev@oracle.com>