[BACKEND] Update to llvm/llvm-project@b5cc222d7429 (#4927)
Upgrading LLVM to pick up the following changes for AMD backend:
* https://github.com/llvm/llvm-project/pull/112237
Changes made:
- changed the signature of visit method in ConstantAnalysis - i.e.,
accepts an instance of the ProgramPoint.
- updated calls to getLatticeElementFor -i.e., accepts an instance of
the ProgramPoint.
- added the required last parameter to LLVM::DISubprogramAttr::get -
i.e., an empty annotations.