This is a followup to 5669972364. At the
time, it seemed like the input is only used on Windows and therefore
unnecessary. However, the package kept building only because the crate
was still being used transitively, through rust-same-file-1.0.
* gnu/packages/crates-io.scm (rust-ignore-0.4)[arguments](cargo-inputs):
Add rust-winapi-util-0.1.
92b99cabd6