[llvm] [llvm][Bitcode][ObjC] Fix order of setter/getter argument to DIObjCProperty constructor (PR #165421)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams approved this pull request.

Not familiar with Objc but the change is simple and makes sense, LGTM

https://github.com/llvm/llvm-project/pull/165421