A+C: add Spring Mc (individual CLA)

R=adg
CC=golang-dev
https://golang.org/cl/240041
diff --git a/AUTHORS b/AUTHORS
index f3358ba..10f4326 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -58,6 +58,7 @@
 Sergei Skorobogatov <skorobo@rambler.ru>
 Sergey 'SnakE'  Gromov <snake.scaly@gmail.com>
 Sergio Luis O. B. Correia <sergio@larces.uece.br>
+Spring Mc <heresy.mc@gmail.com>
 Stephen Weinberg <stephen@q5comm.com>
 Sven Almgren <sven@tras.se>
 Timo Savola <timo.savola@gmail.com>