lib/time/zoneinfo.zip: update to IANA release 2014c

LGTM=minux.ma
R=golang-codereviews, minux.ma
CC=golang-codereviews
https://golang.org/cl/93420046

lib/time/update.bash

@@ -7,8 +7,8 @@
 # downloaded from the ICANN/IANA distribution.
 
 # Versions to use.
-CODE=2014b
-DATA=2014b
+CODE=2014c
+DATA=2014c
 
 set -e
 rm -rf work