RFR: 8315578: PPC builds are broken after JDK-8304913 [v2]

[Aleksey Shipilev]

> Similar to other issues in the same area. I have no PPC32 machine to test the build on, but this matches other fixes for other architectures (https://github.com/openjdk/jdk/commit/83c096d6e20cd6e1164bc666df1be197a10431eb) after this fix the PPC32 Zero build completes fine.

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Switch to PPC32
 - Merge branch 'master' into JDK-8315578-ppc-builds
 - Fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15556/files
  - new: https://git.openjdk.org/jdk/pull/15556/files/218991df..d829d243

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15556&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15556&range=00-01

  Stats: 9123 lines in 245 files changed: 7533 ins; 1023 del; 567 mod
  Patch: https://git.openjdk.org/jdk/pull/15556.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15556/head:pull/15556

PR: https://git.openjdk.org/jdk/pull/15556