[llvm] aarch64: fix testcase (PR #75723)

[Nathan Sidwell via llvm-commits]

urnathan wrote:

> Oops. Thanks for spotting that!
> 
> Unfortunately, the test fails, because it finds the string in the test filename itself 🥇 :(
> 
> ```
> ; CHECK-LABEL: name: no_frame_setup
> ; CHECK-NOT: frame-setup
> ```
> 
> ought to fix it.

Um, it'll see the filename if you just do `%s`, but with `< %s` llc names it `<stdin>` -- I did not see the fail you describe.  (A CHECk-LABEL does no harm though)

https://github.com/llvm/llvm-project/pull/75723