Update CHANGES.txt separately for clean cherry-pick.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.1@1422182 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -16,6 +16,8 @@ Release 1.1.2 - 2012.12.07
 
   BUG FIXES
 
+    HADOOP-9051 Fix ant clean/test with circular symlinks in build dir. (llu)
+
     MAPREDUCE-4396. Port support private distributed cache to
     LocalJobRunner from branch-1-win. (Yu Gao via eyang)