HDFS-4996. Merging change r1504686 from branch-2.1-beta to branch-2.1.0-beta.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1.0-beta@1504694 13f79535-47bb-0310-9956-ffa450edef68
Fix mixed CRLFs in releasenotes again.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1.0-beta@1504712 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9164. Print paths of loaded native libraries in NativeLibraryChecker. (Binglin Chang via llu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1.0-beta@1504713 13f79535-47bb-0310-9956-ffa450edef68