swift

2e7c74c1 - [sil-llvm-gen] Allow for -Xllvm options to be passed to sil-llvm-gen.

[sil-llvm-gen] Allow for -Xllvm options to be passed to sil-llvm-gen. Specifically, we ignore the -Xllvm bit and put the option into FrontendOptions.LLVMArgs so that parts of CompilerInvocation that assumes that -Xllvm flags will be placed there are actually there. We still pass through the argument to llvm::cl so it gets set that way as well. (cherry picked from commit d0d2163e0d0be0ceaf43a314b1e481b03d8e8f21)