Move PIG-3833 and PIG-3813 to 0.12.1 in CHANGES.txt
Move PIG-3833 and PIG-3813 to 0.12.1 in CHANGES.txt


git-svn-id: c4d08399a8c07badad33cbf13a0909bacb78f41f@1582799 13f79535-47bb-0310-9956-ffa450edef68

apache/pig,apache/pig,apache/pig,apache/pig,apache/pig,apache/pig,apache/pig