llama : remove "first token must be BOS" restriction (#2153) #75

Job	Run time
ubuntu-latest-cmake	1m 36s
ubuntu-focal-make	1m 27s
macOS-latest-cmake	2m 27s
macOS-latest-make	1m 54s
ubuntu-latest-cmake-sanitizer (ADDRESS, Debug)	1m 41s
ubuntu-latest-cmake-sanitizer (ADDRESS, Release)	2m 5s
ubuntu-latest-cmake-sanitizer (THREAD, Debug)	1m 7s
ubuntu-latest-cmake-sanitizer (THREAD, Release)	1m 23s
ubuntu-latest-cmake-sanitizer (UNDEFINED, Debug)	1m 43s
ubuntu-latest-cmake-sanitizer (UNDEFINED, Release)	3m 35s
windows-latest-cmake-cublas (12.1.0, cublas)	30m 14s
windows-latest-cmake-cublas (11.7.1, cublas)	33m 7s
windows-latest-cmake (avx2, -DLLAMA_BUILD_SERVER=ON)	2m 7s
windows-latest-cmake (avx, -DLLAMA_BUILD_SERVER=ON -DLLAMA_AVX2=OFF)	2m 47s
windows-latest-cmake (avx512, -DLLAMA_BUILD_SERVER=ON -DLLAMA_AVX512=ON -DBUILD_SHARED_LIBS=ON)	2m 26s
windows-latest-cmake (clblast, -DLLAMA_BUILD_SERVER=ON -DLLAMA_CLBLAST=ON -DCMAKE_PREFIX_PATH="$e...	3m 21s
windows-latest-cmake (openblas, -DLLAMA_BUILD_SERVER=ON -DLLAMA_BLAS=ON -DLLAMA_BLAS_VENDOR=OpenB...	4m 15s
release	53s
	1h 38m 8s

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