[libc-commits] [libc] [libc] Fix accidental LIBC_NAMESPACE_syscall definition (PR #69548)

[Joseph Huber via libc-commits]

https://github.com/jhuber6 approved this pull request.

Collateral damage from someone doing `find . -type f -exec sed -i 's/namespace __llvm_libc/namespace LIBC_NAMESPACE/g' {} \;` presumably.

https://github.com/llvm/llvm-project/pull/69548