Fix gen-windows-sys-binding #1657

Job	Run time
Test CUDA support	32s
MSRV (ubuntu-latest)	20s
Test build-std (aarch64-tvos)	1m 45s
MSRV (windows-latest)	47s
Test build-std (aarch64-tvos-sim)	1m 31s
Test (stable)	32s
Test build-std (x86_64-tvos)	1m 47s
Test (beta)	56s
Test (nightly)	1m 10s
Test (linux32)	1m 19s
Clippy	13s
Test (macos)	2m 27s
Test (aarch64-macos)	1m 6s
Rustfmt	14s
Test (aarch64-ios)	32s
Test (win32)	1m 26s
semver-checks	19s
Test (win64)	2m 2s
Test (mingw32)	1m 33s
Test (mingw64)	1m 55s
Test (windows-2019)	2m 9s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	3m 3s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, clang, clang++)	2m 4s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, clang-cl, clang-cl)	1m 55s
	31m 37s

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