add ffi tests & fix ffi #1324

Job	Run time
build-test (windows-latest, stable, x86_64-pc-windows-msvc, true)	18m 3s
report	16m 40s
build-test (macos-latest, stable, x86_64-apple-darwin, true)	8m 3s
style	41s
build-test (ubuntu-20.04, stable, x86_64-unknown-linux-gnu, true)	7m 55s
build-test (ubuntu-22.04, stable, x86_64-unknown-linux-gnu, true)	8m 0s
build-test (ubuntu-22.04, stable, i686-unknown-linux-gnu, true)	9m 59s
build-test (ubuntu-22.04, nightly, wasm32-unknown-unknown, true, --no-default-features, --no-run ...	5m 58s
build-test (ubuntu-22.04, 1.77, x86_64-unknown-linux-gnu)	4m 24s
build-test (ubuntu-22.04, beta, x86_64-unknown-linux-gnu)	4m 18s
build-test (ubuntu-22.04, nightly, x86_64-unknown-linux-gnu, true, miri)	6m 13s
logtalk-test	7m 59s
release	0s
	1h 38m 13s

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