HADOOP-9309. Test failures on Windows due to UnsatisfiedLinkError in NativeCodeLoader#buildSupportsSnappy. Contributed by Arpit Agarwal.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-trunk-win@1448769 13f79535-47bb-0310-9956-ffa450edef68