llvm-project

497fbd0e - [LLVM][Cygwin] Remove special case for CXX extensions on Cygwin. (#138328)

[LLVM][Cygwin] Remove special case for CXX extensions on Cygwin. (#138328) This is no longer necessary, and results in an inconvenient define of `i386` on i386 Cygwin targets which breaks compiling llvm/include/llvm/ExecutionEngine/JITLink/i386.h. Signed-off-by: Jeremy Drake <github@jdrake.com>