[clang] [DTLTO][TEST] Fix the DTLTO Clang driver tests failing on some bots (PR #159050)

[via cfe-commits]

bd1976bris wrote:

@petrhosek thanks for the approval. After a deeper investigation by my colleague Andrew, we found that the changes here merely mask the real issue: the DTLTO Clang driver changes do not work with the Multicall toolchain executable. I’m going to close this and replace it with a change that XFAILs these tests under Multicall.

https://github.com/llvm/llvm-project/pull/159050