[llvm] [LLVM][DWARF] Change to consistently print out abbrev code. (PR #68353)

[Felipe de Azevedo Piovezan via llvm-commits]

felipepiovezan wrote:

+1 to having the example in the commit description.

I would also suggest rewording the title to drop the "llvm" and be a bit more descriptive. Something like: 
"[DWARF] Use the same abbreviation format for debug_name and debug_abbrev"

https://github.com/llvm/llvm-project/pull/68353