[clang] [llvm] Use XMACROS for MachO platforms. (PR #69262)

[Juergen Ributzka via cfe-commits]

ributzka wrote:

Unrelated build issue on windows:
C:\ws\src\mlir\include\mlir/IR/BuiltinTypeInterfaces.h(14): fatal error C1083: Cannot open include file: 'mlir/IR/BuiltinTypeInterfaces.h.inc': No such file or directory

https://github.com/llvm/llvm-project/pull/69262