Some change in Cargo/Rust version 1.70 or 1.71 appears to have broken
the build on Windows because we are incorrectly attempting to check the
native static libraries by compiling an empty file (/dev/null) which
does not exist on Windows.
A simple fix is to make an empty file of our own and use that instead.
Fixes: https://github.com/Cisco-Talos/clamav/issues/990