The gfx1151 llama.cpp prebuilt bundles a regressed TheRock ROCm runtime whose
libhsa-runtime64 segfaults at HIP init on bare-metal Strix Halo (unslothai#6276),
so every model / embedder load crashes (code -11) while a Vulkan build works.
Extend the existing WSL-only _wsl_system_rocm_lib_dirs (which already shadows a
bad bundled HIP with the system one) to also return the system ROCm lib dirs on
bare-metal Strix Halo (detected via /proc/cpuinfo) when a system HIP runtime is
present. The bundle still supplies libggml-hip / librocblas gfx1151 kernels; the
driver-matched system libamdhip64 / libhsa-runtime64 drive the GPU. Applied
identically to the serve-time and install-validation mirrors so a prebuilt that
validates runs the same. No-op without system ROCm or on any non-Strix arch;
UNSLOTH_LLAMA_NO_SYSTEM_ROCM=1 opts out. The complete fix is repinning the
bundled runtime to a good TheRock nightly in the llama.cpp prebuilt CI; this is
the in-repo mitigation.
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