8337102: JITTester: Fix breaks in static initialization blocks

[kirill-shirokov]

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The backport verified on MacOS/Linux/Windows by manually running JITTester.

Verification involved modifying JITTester code to terminate with non-zero exit code when encountering specific compilation error (a break statement in a static initializer) in the generated code and enabling static initializer generation in configuration file in non-fixed version.

Without the fix typically the error reproduces during the first generation round. With the fix, there is no error for 10s of rounds.

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Progress

• [ ] JDK-8337102 needs maintainer approval
• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue

Issue

• JDK-8337102: JITTester: Fix breaks in static initialization blocks (Bug - P4)

Reviewing

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