CONTRIBUTORS: add David Crawshaw (Google CLA)
R=golang-dev, bradfitzgo
CC=golang-dev
https://golang.org/cl/4425054
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 8a35cd3..dfb2a0b 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -77,6 +77,7 @@
Daniel Theophanes <kardianos@gmail.com>
Dave Cheney <dave@cheney.net>
David Anderson <danderson@google.com>
+David Crawshaw <david.crawshaw@zentus.com>
David Forsythe <dforsythe@gmail.com>
David G. Andersen <dave.andersen@gmail.com>
David Symonds <dsymonds@golang.org>