[llvm] [AVR] Emit relocation record for local branch (PR #145291)

[Ben Shi via llvm-commits]

benshi001 wrote:

> cc @benshi001 (I know you don't have much time on your hands now, so feel free to postpone if you think a more thorough investigation or testing is needed here)

I am still hesitating whether to simply use true, or check if relaxation is specified, not sure if LTO is also affected.

https://github.com/llvm/llvm-project/pull/145291