[lld] [llvm] [llvm-readobj][ELF] Alter JSON/LLVM output on note sections to allow for multiple notes per section in JSON (PR #96813)

[James Henderson via llvm-commits]

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+## Test that note values are interpreted correctly for core files with multiple sections.
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jh7370 wrote:

What's the relevance of this being a core file to the actual behaviour you want to test?

https://github.com/llvm/llvm-project/pull/96813