lib/time: update to IANA release 2016d (Apr 2016).

Change-Id: I46d9ea31cf5836d054a9ce22af4dd1742a418a07
Reviewed-on: https://go-review.googlesource.com/22588
Run-TryBot: David Symonds <dsymonds@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/lib/time/update.bash b/lib/time/update.bash
index 86b1f21..01fe07b 100755
--- a/lib/time/update.bash
+++ b/lib/time/update.bash
@@ -8,8 +8,8 @@
 # Consult http://www.iana.org/time-zones for the latest versions.
 
 # Versions to use.
-CODE=2016a
-DATA=2016a
+CODE=2016d
+DATA=2016d
 
 set -e
 rm -rf work
diff --git a/lib/time/zoneinfo.zip b/lib/time/zoneinfo.zip
index 0207d6b..530a04a 100644
--- a/lib/time/zoneinfo.zip
+++ b/lib/time/zoneinfo.zip
Binary files differ