Merged in from 9.3, this updates JFFI to fix #7695, and #7759. See also the previous attempt at this in #7579.

• jffi 1.3.13 (https://github.com/jnr/jffi/milestone/35)
• jnr-ffi 2.2.16 (https://github.com/jnr/jnr-ffi/milestone/45)
• jnr-posix 3.1.19 (https://github.com/jnr/jnr-posix/milestone/58)
• jnr-enxio 0.32.17 (https://github.com/jnr/jnr-enxio/milestone/40)
• jnr-unixsocket 0.38.22 (https://github.com/jnr/jnr-unixsocket/milestone/50)