[clang] [llvm] [clang][DebugInfo] Add virtual call-site target information in DWARF. (PR #167666)

[Carlos Alberto Enciso via llvm-commits]

CarlosAlbertoEnciso wrote:

@dwblaikie Thanks very much for your great input.
After some discussions with our debugger team, adding a new attribute to eliminate the current ambiguity works well for them,
A ``DW_AT_LLVM_virtual_call_origin`` has been suggested.

https://github.com/llvm/llvm-project/pull/167666