[clang] [WinEH] Also check object unwinding for enabling CXXExceptions(/ehs*) (PR #180959)

[Hans Wennborg via cfe-commits]

https://github.com/zmodem commented:

Thanks!

The functional change looks good to me.

I'm having trouble understanding the title:

> [WinEH] Also check object unwinding for enabling CXXExceptions(/ehs*)

How about something like "[WinEH] Only emit err_seh_object_unwinding when CXXExceptions are enabled"?

https://github.com/llvm/llvm-project/pull/180959