[llvm] [DwarfGenerator] Calculate relative offset according to Dwarf Version (PR #84847)

[Will Hawkins via llvm-commits]

hawkinsw wrote:

Spent half a day tracking down why my code based on DwarfGenerator was not doing the right thing before I realized that 11 and 12 are different numbers. I know it's a small change, but I hope that it helps!

Thank you for all that you do to keep LLVM going!


https://github.com/llvm/llvm-project/pull/84847