[llvm] [SPARC][Utilities] Add names for SPARC ELF flags in LLVM binary utilities (PR #102843)

[via llvm-commits]

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+## Test various combinations of ELF flag values for SPARC.
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koachan wrote:

For directory naming I am following the usage in other places (for example `llvm/lib/Target/Sparc` and `llvm/test/MC/Sparc`), for consistency with them.
In any case, though, any spelling would be fine by me.

https://github.com/llvm/llvm-project/pull/102843