[llvm] [llvm-dwarfdump] Added --output-style option for controlling output format (PR #216559)

[via llvm-commits]

arrowten wrote:

> Nothing immediately stands out to me, although I'll do a final check over once you make your change. I do want buy-in from others though before we land any of the JSON output changes, plus at least one concrete implementation for dumping with JSON output.

@jh7370 Changed it. Please let me know.

https://github.com/llvm/llvm-project/pull/216559