[llvm] Default to LLDB debugger tuning for shared library builds (PR #83083)

[David Blaikie via llvm-commits]

dwblaikie wrote:

> > & sounded like the plan from the last review was to add a warning to the pretty printer - rather than to do this?
> 
> I was planning to also do that, just haven't got around to that part yet.
> 
> Regarding this change, how would you feel about an opt-in CMake option that adds this flag when enabled? I've had lots of cases where messing with `CMAKE_C(XX)_FLAGS` resulted in weird failures, so I'd prefer a boolean flag that just calls add_compile_options().

Yeah, I'm down with that.

https://github.com/llvm/llvm-project/pull/83083