[PATCH 0/1] MR4547: ntdll: Fix macOS build error with LLVM 17.

[Brendan Shanks (＠bshanks)]

Starting with LLVM 17, having non-private labels between `.cfi_startproc`/`.cfi_endproc` triggers "invalid CFI advance_loc expression" errors when targeting Mach-O.

Use local labels instead, and store the pointer in `.data` so it can be read by `handle_syscall_trap()`.

Based on a patch by Jacek Caban.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55863