ci: add yasm patch

[madebr]

CMakeLists.txt from upstream yasm is not CMake 4.x compatible.

• I confirm that I am the author of this code and release it to the SDL_mixer project under the Zlib license. This contribution does not contain code from other sources, including code generated by a Large Language Model ("AI").

[sezero]

The following in yasm build stands out:

[78/127] Generating x86insn_gas.c
fail to map group of size 2 for tab size 512
[79/127] cmd.exe /c

But yasm build doesn't fail??

Is the issue related to python, e.g. python2 vs python3 ?

[madebr]

[78/127] Generating x86insn_gas.c
fail to map group of size 2 for tab size 512

Is the issue related to python, e.g. python2 vs python3 ?

I don't know but I don't think so. That error is emitted by C code (tools/genperf/perfect.c:565).
It's a warning/error about failing to create a perfect hashing function.
I looked a bit into running the unit tests using CMake, but upstream's lack of feedback is discouraging.

edit: definitely no. It was already happening before:
https://github.com/madebr/yasm/actions/runs/27537918380/job/81391982415#step:9:596