[clang] [clang][DebugInfo] Store current location metadata in CGDebugInfo (PR #193918)

[Cullen Rhodes via cfe-commits]

c-rhodes wrote:

ping

rebased and add a couple of small fixes I noticed after taking another look. would appreciate if someone could take a look or point me at someone who could

https://github.com/llvm/llvm-project/pull/193918