RFR: 8282468: Loom: Fix build failures for PPC64, S390, ARM32 and Zero

[Hao Sun]

Updates made in commits [1][2][3][4] are missing for PPC64, S390, ARM32
and Zero, leading to build failures.

Even though we mainly focus on x64 and AArch64 platforms currently, I
think it would be nice if the builds on other platforms are not broken.

Hence, we apply the similar updates from [1][2][3][4] to PPC64, S390,
ARM32 and Zero in this patch.

Testing:

Linux PPC64 cross-compilation
Linux S390 cross-compilation
Linux ARM32 cross-compilation
Linux AArch64 Zero (Hotspot) compilation
Linux x86_64 tier1_loom passes
Linux AArch64 tier1_loom passes

[1] https://github.com/openjdk/loom/commit/4f9b661
[2] https://github.com/openjdk/loom/commit/74b27d0
[3] https://github.com/openjdk/loom/commit/90fb1b9
[4] https://github.com/openjdk/loom/commit/d77311e

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Commit messages:
 - Loom: Fix build failures for PPC64, S390, ARM32 and Zero

Changes: https://git.openjdk.java.net/loom/pull/92/files
 Webrev: https://webrevs.openjdk.java.net/?repo=loom&pr=92&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282468
  Stats: 620 lines in 24 files changed: 223 ins; 226 del; 171 mod
  Patch: https://git.openjdk.java.net/loom/pull/92.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/92/head:pull/92

PR: https://git.openjdk.java.net/loom/pull/92