RFR: 8281043: Intrinsify recursive ObjectMonitor locking for PPC64 [v3]

[Martin Doerr]

> PPC64 implementation of JDK-8277180.

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  Update Copyright years.

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7305/files
  - new: https://git.openjdk.java.net/jdk/pull/7305/files/1eec2373..88861201

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7305&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7305&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7305.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7305/head:pull/7305

PR: https://git.openjdk.java.net/jdk/pull/7305