[clang] [lld] [llvm] [llvm][lld][clang] Delay initializing TargetOptions in LTO builds until a Triple is available (PR #179509)

[Teresa Johnson via cfe-commits]

https://github.com/teresajohnson commented:

I think the code changes look fine to me now, barring remaining comments from others. But I am wondering about the tests - it looks like only llc tests were added but I'm unsure of how those are affected by LTO, or are testing the LTO changes here?

https://github.com/llvm/llvm-project/pull/179509