musa: upgrade musa sdk to rc4.2.0

[yeahdongcn]

This will require syncing with the latest changes from ggml once ggml-org/llama.cpp#14498 is merged.

Testing Done

docker build -t sd-musa -f Dockerfile.musa .

[leejet]

Is rc4.2.0 required to wait for the merge of ggml's PR?

[yeahdongcn]

Is rc4.2.0 required to wait for the merge of ggml's PR?

Yes, though I'm not familiar with stable-diffusion.cpp's strategy for syncing ggml. I’ll ping you once my changes are merged into ggml.

[yeahdongcn]

@leejet It appears that ggml (master branch) now includes my changes. Starting from commit d1f98530dc94469b5ccc8b7c8eff8a408dd82311, things should be working as expected.

[leejet]

Thank you for your contribution.