[clang][test] Don't require specific alignment in test case (#130589)

https://github.com/llvm/llvm-project/pull/129952 /
42d49a77241df73a17cb442973702fc460e7fb90 added this test which is
failing on 32-bit ARM because the alignment chosen is 4 not 8. Which
would make sense if this is a 32/64 bit difference

https://lab.llvm.org/buildbot/#/builders/154/builds/13059
```
<stdin>:34:30: note: scanning from here
define dso_local void @_Z1fv(ptr dead_on_unwind noalias writable sret(%struct.B) align 4 %agg.result) #0 {
                             ^
<stdin>:38:2: note: possible intended match here
 %0 = load ptr, ptr @x, align 4
 ^
```
The other test does not check alignment, so I'm assuming that it is not
important here.
1 file changed
tree: 168564921c3be83d87cc6a3b4aa96863532fa8cd
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libunwind/
  16. lld/
  17. lldb/
  18. llvm/
  19. llvm-libgcc/
  20. mlir/
  21. offload/
  22. openmp/
  23. polly/
  24. pstl/
  25. runtimes/
  26. third-party/
  27. utils/
  28. .clang-format
  29. .clang-tidy
  30. .git-blame-ignore-revs
  31. .gitattributes
  32. .gitignore
  33. .mailmap
  34. CODE_OF_CONDUCT.md
  35. CONTRIBUTING.md
  36. LICENSE.TXT
  37. pyproject.toml
  38. README.md
  39. SECURITY.md
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