[llvm] [DebugInfo] Swap 'Unit' and 'Type' positions in DISubprogram. (PR #96474)

[David Blaikie via llvm-commits]

dwblaikie wrote:

(might be worth checking where the earlier version of the check was (before fortran - looks like it just checked the upper bound was >= 0) - and if the author is still around, cc them on this in case they want to protest that checking that is really important or something)

https://github.com/llvm/llvm-project/pull/96474