RFR: 8291822: ARM: fix build warnings with GCC11 [v3]

[Marc R. Hoffmann]

> Same workaround was applied for other platforms in JDK-8270083 and JDK-8271869

Marc R. Hoffmann has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  8291822: ARM32: Build errors with GCC 11 in frame::saved_oop_result
  
  Same workaround was applied for other platforms in
  JDK-8270083 and JDK-8271869

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9727/files
  - new: https://git.openjdk.org/jdk/pull/9727/files/686e5507..5596ea10

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9727&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9727&range=01-02

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9727.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9727/head:pull/9727

PR: https://git.openjdk.org/jdk/pull/9727