Build fails on Alpine Linux

[EZForever]

8a7be58 introduces a dependency on execinfo.h, which is not available (or rather, removed) on Alpine Linux. This causes ggml and llama.cpp builds on Alpine to fail, as can be seen here: https://github.com/EZForever/llama.cpp-static/actions/runs/10128910987/job/28008339939

[slaren]

Feel free to open a PR to disable this functionality on Alpine.

[EZForever]

Fixed in llama.cpp by ggerganov/llama.cpp#8783.