[llvm] Fix uninitialized variable (PR #89040)

[Malay Sanghi via llvm-commits]

MalaySanghi wrote:

@iagarwa 
The field is initialized before use. Just not in the constructor. Look at PSVRuntimeInfo::finalize. So it seems to me that there's no bug.

Although I don't see a downside in initializing the field, I think you **can** ignore this.

https://github.com/llvm/llvm-project/pull/89040