llvm-project

bd319d90 - [Cygwin] CYGWIN is not WIN32 in current CMake (#143130)

[Cygwin] CYGWIN is not WIN32 in current CMake (#143130) On old CMake, Cygwin were also WIN32 but currently not. LLVM_ON_UNIX=1 and LLVM_HAVE_LINK_VERSION_SCRIPT=0 should be defined for Cygwin target.