d/patches: Add support for riscv64/atomics

It turns out we need to query some specific atomics/c11 functionalities
for riscv64 arch.

Ref:
* https://buildd.debian.org/status/fetch.php?pkg=jpeg-xl&arch=riscv64&ver=0.7.0%7Egit20220120.0647da4%2Bds-2&stamp=1643360380&raw=0