[8u] RFR for backport of JDK-8188868: PPC64: Support AES intrinsics on Big Endian

Hi, May I get reviews for enhancement backport of JDK-8188868: PPC64: Support AES intrinsics on Big Endian? http://cr.openjdk.java.net/~horii/jdk8u_aes_be/8188868/webrev.00/ There is no code change except for an immediate parameter of vsldoi (-8 in jdk8u was changed to 8 to match with the latest code), besides the difference of directory tree structure. Since not a small number of customers are still using jdk8, especially in AIX, JDK-8188868 is important for them to improve performance of secure network transportation. Regards, Ogata