[clang] [NFC][CFI] Avoid clang error in CFI tests (PR #135981)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

> This is causing a test failure in our clang CI bots: https://luci-milo.appspot.com/ui/p/fuchsia/builders/toolchain.ci/clang-host-linux-x64/b8717414717471782065/overview
> 
> It doesn't seem that any error output is produced for the test though; do you have an intuition for what's happening? This is the only change in the blamelist, so it's definitely a result of this PR.

https://github.com/llvm/llvm-project/pull/136002 to get output

if it gives no clue, I'll revert both


https://github.com/llvm/llvm-project/pull/135981