MAPREDUCE-6577 addendum. Moved the changelog to 2.6.4 which is the earliest target.

hadoop-mapreduce-project/CHANGES.txt

@@ -315,9 +315,6 @@ Release 2.9.0 - UNRELEASED
 
   BUG FIXES
 
-    MAPREDUCE-6577. MR AM unable to load native library without
-    MR_AM_ADMIN_USER_ENV set (sjlee)
-
 Release 2.8.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES
@@ -996,12 +993,15 @@ Release 2.6.4 - UNRELEASED
 
   IMPROVEMENTS
 
-  MAPREDUCE-6436. JobHistory cache issue. (Kai Sasaki via zxu)
+    MAPREDUCE-6436. JobHistory cache issue. (Kai Sasaki via zxu)
 
   OPTIMIZATIONS
 
   BUG FIXES
 
+    MAPREDUCE-6577. MR AM unable to load native library without
+    MR_AM_ADMIN_USER_ENV set (sjlee)
+
 Release 2.6.3 - 2015-12-17
 
   INCOMPATIBLE CHANGES