RFA: 8073139: PPC64: User-visible arch directory and os.arch value on ppc64le cause issues with Java tooling

[Severin Gehwolf]

Hi,

Please approve this 8u backport request related to ppc64le. When using
a ppc64le build from 8u and pulling in natives from Maven etc. users
might end up getting ppc64 (BE) binaries because of the way the JDK
reports itself to the user.

Bug: https://bugs.openjdk.java.net/browse/JDK-8073139
webrevs: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8073139/jdk8/01/

Review thread of this 8u change:
http://mail.openjdk.java.net/pipermail/build-dev/2018-September/023417.html

The 8u change has been reviewed by David Holmes, Goetz Lindenmaier,
Erik Joelsson. Not all changes from JDK 9 apply for the backport.

Testing: Linux ppc64le/be builds and verifying os.arch property reports
correctly. No change for ppc64be builds.

Thanks,
Severin