[SAOC 2025] Improve importC Weekly Update #9

[Emmanuel]

Hi all,

This week, I completed the prividing implementations for some C 
builtin functions that we are not able to resolve. it covered 
CRC, overflows and basic bit operations.

we had some of the functionalities already implemented in D so I 
borrowed a lot and used them in matching identifier.



Link to PR: 
https://github.com/dlang/dmd/pull/22102/commits/bc00a8250c22060692b5892427f4bddcbc8ecf09

for now I have local test of sdl3 where I am adding more test to 
ensure sdl3 works well.