Move MR-5982 and MR-6492 to the appropriate section

hadoop-mapreduce-project/CHANGES.txt

@@ -10,13 +10,6 @@ Release 2.6.4 - UNRELEASED
 
     MAPREDUCE-6436. JobHistory cache issue. (Kai Sasaki via zxu)
 
-    MAPREDUCE-5982. Task attempts that fail from the ASSIGNED state can
-    disappear (Chang Li via jlowe)
-
-    MAPREDUCE-6492. AsyncDispatcher exit with NPE on
-    TaskAttemptImpl#sendJHStartEventForAssignedFailTask (Bibin A Chundatt via
-    jlowe)
-
   OPTIMIZATIONS
 
   BUG FIXES
@@ -24,6 +17,13 @@ Release 2.6.4 - UNRELEASED
     MAPREDUCE-6577. MR AM unable to load native library without
     MR_AM_ADMIN_USER_ENV set (sjlee)
 
+    MAPREDUCE-5982. Task attempts that fail from the ASSIGNED state can
+    disappear (Chang Li via jlowe)
+
+    MAPREDUCE-6492. AsyncDispatcher exit with NPE on
+    TaskAttemptImpl#sendJHStartEventForAssignedFailTask (Bibin A Chundatt via
+    jlowe)
+
 Release 2.6.3 - 2015-12-17
 
   INCOMPATIBLE CHANGES