From https://github.com/llvm/llvm-project/pull/140761. `MsvcBuilder` passed `/std:<value>` (if specified) after `--`, so the compiler would interpret this as a file. This moves the argument before the `--`.
From https://github.com/llvm/llvm-project/pull/140761. `MsvcBuilder` passed `/std:<value>` (if specified) after `--`, so the compiler would interpret this as a file. This moves the argument before the `--`.