[llvm] AArch64: Reformat some debug printing blocks (NFC) (PR #165178)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-darwin` running on `doug-worker-3` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/23/builds/15006

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'Clang :: Interpreter/pretty-print.cpp' FAILED ********************
Exit Code: 127

Command Output (stdout):
--
# RUN: at line 1
/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/clang-repl "int i = 10;" 'extern "C" int printf(const char*,...);'             'auto r1 = printf("i = %d\n", i);' | /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck --check-prefix=CHECK-DRIVER /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/clang/test/Interpreter/pretty-print.cpp
# executed command: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/clang-repl 'int i = 10;' 'extern "C" int printf(const char*,...);' 'auto r1 = printf("i = %d\n", i);'
# note: command had no output on stdout or stderr
# executed command: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck --check-prefix=CHECK-DRIVER /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/clang/test/Interpreter/pretty-print.cpp
# note: command had no output on stdout or stderr
# RUN: at line 6
cat /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/clang/test/Interpreter/pretty-print.cpp | /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/clang-repl -Xcc -std=c++11 -Xcc -fno-delayed-template-parsing | /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/clang/test/Interpreter/pretty-print.cpp
# executed command: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/clang/test/Interpreter/pretty-print.cpp
# .---command stderr------------
# | Could not create process (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck) due to [Errno 24] Too many open files
# `-----------------------------
# error: command failed with exit status: 127

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/165178