[llvm-branch-commits] [nsan] Fix style issue (PR #96142)

[Fangrui Song via llvm-branch-commits]

https://github.com/MaskRay created https://github.com/llvm/llvm-project/pull/96142

The initial check-in of compiler-rt/lib/nsan #94322 has a lot of style
issues. Fix them before the history becomes more useful.