RFR: 8256924: ppc, ppcle, s390: JVM crashes at VM init after JDK-8254231

[Martin Doerr]

Some parts methodHandles_<platform>.cpp and sharedRuntime_<platform>.cpp are missing.
Note that C2 compiler still has issues on PPC64.

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Commit messages:
 - 8256924: ppc, ppcle, s390: JVM crashes at VM init after JDK-8254231

Changes: https://git.openjdk.java.net/jdk/pull/1411/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1411&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256924
  Stats: 25 lines in 4 files changed: 21 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1411.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1411/head:pull/1411

PR: https://git.openjdk.java.net/jdk/pull/1411