[llvm] [Utils] update_llc_test_checks.py: updated the regexp for ARM target (PR #148287)

[Tommaso Fellegara via llvm-commits]

Felle33 wrote:

Is there something I can do on my side? I could work on the AArch64 files, but I have not found a file that was updated with the script and the flag --asm-verbose=false was passed at the same time

https://github.com/llvm/llvm-project/pull/148287