HADOOP-10693. Implementation of AES-CTR CryptoCodec using JNI to OpenSSL (hitliuyi via cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/fs-encryption@1607768 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10693: add files left out of previous checkin (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/fs-encryption@1607769 13f79535-47bb-0310-9956-ffa450edef68