[jdk11u-dev] RFR: 8325326: [PPC64] Don't relocate in case of allocation failure

[Martin Doerr]

Clean backport of [JDK-8325326](https://bugs.openjdk.org/browse/JDK-8325326).

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Commit messages:
 - Backport 4388095cde20dec602ada9fe2977f1a359ceab91

Changes: https://git.openjdk.org/jdk11u-dev/pull/2603/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2603&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325326
  Stats: 12 lines in 1 file changed: 6 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2603.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2603/head:pull/2603

PR: https://git.openjdk.org/jdk11u-dev/pull/2603