RFR: 8303147: [s390x] fast & slow debug builds are broken

[Amit Kumar]

This PR fixes broken fast debug and slow debug build for s390x-arch. tier1 test are completed and results are not affect after this patch.

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Commit messages:
 - build fix for s390x

Changes: https://git.openjdk.org/jdk/pull/12825/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12825&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303147
  Stats: 53 lines in 12 files changed: 35 ins; 13 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/12825.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12825/head:pull/12825

PR: https://git.openjdk.org/jdk/pull/12825