llamafile : improve sgemm.cpp #11030

Job	Run time
Push Docker image to Docker Hub (light, .devops/main.Dockerfile, linux/amd64,linux/arm64)	24m 24s
Push Docker image to Docker Hub (full, .devops/full.Dockerfile, linux/amd64,linux/arm64)	28m 33s
Push Docker image to Docker Hub (server, .devops/server.Dockerfile, linux/amd64,linux/arm64)	24m 37s
Push Docker image to Docker Hub (light-cuda, .devops/main-cuda.Dockerfile, linux/amd64)	13m 33s
Push Docker image to Docker Hub (full-cuda, .devops/full-cuda.Dockerfile, linux/amd64)	15m 42s
Push Docker image to Docker Hub (server-cuda, .devops/server-cuda.Dockerfile, linux/amd64)	15m 54s
Push Docker image to Docker Hub (light-rocm, .devops/main-rocm.Dockerfile, linux/amd64,linux/arm64)	10m 36s
Push Docker image to Docker Hub (full-rocm, .devops/full-rocm.Dockerfile, linux/amd64,linux/arm64)	13m 6s
Push Docker image to Docker Hub (server-rocm, .devops/server-rocm.Dockerfile, linux/amd64,linux/a...	10m 9s
Push Docker image to Docker Hub (light-intel, .devops/main-intel.Dockerfile, linux/amd64)	6m 58s
Push Docker image to Docker Hub (server-intel, .devops/server-intel.Dockerfile, linux/amd64)	9m 52s
	2h 53m 24s

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