llvm::sys::fs::F_None is removed in recent releases

[tcztzy]

seq/compiler/sir/llvm/llvisitor.cpp

Line 421 in 54451c3

llvm::raw_fd_ostream stream(filename, err, llvm::sys::fs::F_None);

https://reviews.llvm.org/D101506
Maybe we can use llvm::sys::fs::OF_None instead?

[markhend]

Thanks for the suggestion.