llama: add compiler tags for cpu features (#7137)

This adds the ability to customize the default runner with user specified flags

scripts/env.sh

@@ -17,6 +17,8 @@ OLLAMA_COMMON_BUILD_ARGS="--build-arg=VERSION \
     --build-arg=CUDA_V12_ARCHITECTURES \
     --build-arg=OLLAMA_SKIP_ROCM_GENERATE \
     --build-arg=OLLAMA_FAST_BUILD \
+    --build-arg=CUSTOM_CPU_FLAGS \
+    --build-arg=GPU_RUNNER_CPU_FLAGS \
     --build-arg=AMDGPU_TARGETS"
 OLLAMA_NEW_RUNNERS=${OLLAMA_NEW_RUNNERS:-""}
 if [ -n "${OLLAMA_NEW_RUNNERS}" ]; then