[clang] [lld] [llvm] [polly] Fix regression tests with bad FileCheck checks (PR #140373)

[David Green via cfe-commits]

davemgreen wrote:

These two are failing:
Clang.CodeGen/paren-list-agg-init.cpp
Clang.CodeGenCXX/microsoft-abi-throw.cpp
Can you try and fix them? (or remove them from this review and handle them separately). The others look OK.

https://github.com/llvm/llvm-project/pull/140373