RFR: JDK-8256922: ppc, ppcle build broken after JDK-8254231

[Thomas Stuefe]

Hi,

may I please have reviews for these fixes to the ppc, ppcle builds after JDK-8254231.

Once the build is fixed, VM does not come up, but that is a separate issue (JDK-8256924).

This roughly followed Alekseys work on s390, but additionally I had to rename the _abi macro due to name conflict with a class member in the new code.

Thanks, Thomas

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Commit messages:
 - ppc-fixes

Changes: https://git.openjdk.java.net/jdk/pull/1404/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1404&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256922
  Stats: 211 lines in 18 files changed: 153 ins; 0 del; 58 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1404.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1404/head:pull/1404

PR: https://git.openjdk.java.net/jdk/pull/1404