Bump libffi #14120

Job	Run time
Ensure compilation on various targets	29s
Run rust tests (macos-latest)	29s
Run tests under miri	43s
Run rust tests (windows-latest)	37s
Run rust tests (ubuntu-latest)	30s
Run snippets and cpython tests (macos-latest)	30s
Check Rust code with rustfmt and clippy	43s
Check the WASM package and demo	34s
Run snippets and cpython tests on wasm-wasi	40s
Run snippets and cpython tests (ubuntu-latest)	44s
Run snippets and cpython tests (windows-latest)	35s
	6m 34s

Provide feedback