[clang] [clang][CodeGen] Drop debug location on the if-then exit branch (PR #212942)

[Jim Lin via cfe-commits]

tclin914 wrote:

> What's the relationship between this and #207129?

I think #207129 is going to remove the forwarding block (only used to jump to end block) to avoid incorrect source location. This PR removes debug info from the unconditional branch (if block to continuation block). It is exactly different.

https://github.com/llvm/llvm-project/pull/212942