Rust: Update riot-sys and riot-wrappers

This pulls in several fixes from these repositories:

* riot-sys:
    * Add `random` module to `riot-headers` (RIOT-OS/rust-riot-sys#26)
    * README: fix 2 typos (RIOT-OS/rust-riot-sys#31)
    * bindgen: Use 0.64 (RIOT-OS/rust-riot-sys#30)
    * wolfSSL support added (RIOT-OS/rust-riot-sys#28)
    * extern-types: Generate replacement types dynamically (RIOT-OS/rust-riot-sys#27)
    * Extern types: Add netq_t, make them large (RIOT-OS/rust-riot-sys#25)
    * doc: Suppress warnings about things C2Rust does not uphold (RIOT-OS/rust-riot-sys#23)
    * export macro_DAC_LINE (RIOT-OS/rust-riot-sys#22)
    * Add BINDGEN_OUTPUT_FILE export (RIOT-OS/rust-riot-sys#21)
* riot-wrappers:
    * DAC: Add wrapper around RIOTs DAC-interface (RIOT-OS/rust-riot-wrappers#36)
    * saul: Compatibly rename G* variants (RIOT-OS/rust-riot-wrappers#50)
    * tests: Add test for auto-init when auto-init debug is active (RIOT-OS/rust-riot-wrappers#48)
    * gcoap: Provide link encoder (RIOT-OS/rust-riot-wrappers#47)
    * Drop SUIT support in riot-wrappers (RIOT-OS/rust-riot-wrappers#44)
    * Add an auto init module (RIOT-OS/rust-riot-wrappers#45)
    * gcoap: Allow registration without scope for 'static listeners (RIOT-OS/rust-riot-wrappers#43)

Through direct dependency changes (the bindgen update), the number of
transitive dependencies could be reduced.

(cherry picked from commit de41031)