main.swift: fix EOS checking #6533

Job	Run time
ubuntu-focal-make	1m 27s
ubuntu-latest-cmake-sanitizer (ADDRESS, Debug)	3m 39s
macOS-latest-cmake	3m 8s
ubuntu-latest-cmake-sanitizer (ADDRESS, Release)	3m 21s
macOS-latest-cmake-ios	2m 13s
ubuntu-latest-cmake-sanitizer (THREAD, Debug)	8m 11s
ubuntu-latest-cmake-sanitizer (THREAD, Release)	4m 44s
macOS-latest-cmake-tvos	1m 33s
macOS-latest-make	1m 39s
ubuntu-latest-cmake-sanitizer (UNDEFINED, Debug)	3m 16s
ubuntu-latest-cmake-sanitizer (UNDEFINED, Release)	3m 16s
ubuntu-latest-cmake	1m 21s
ubuntu-latest-cmake-mpi (mpich)	1m 39s
ubuntu-latest-cmake-mpi (libopenmpi-dev)	1m 36s
macOS-latest-swift (generic/platform=macOS)	13s
macOS-latest-swift (generic/platform=iOS)	21s
macOS-latest-swift (generic/platform=tvOS)	1s
windows-latest-cmake (noavx, -DLLAMA_NATIVE=OFF -DLLAMA_BUILD_SERVER=ON -DLLAMA_AVX=OFF -DLLAMA_A...	2m 17s
windows-latest-cmake-cublas (12.2.0, cublas)	7m 21s
windows-latest-cmake (avx2, -DLLAMA_NATIVE=OFF -DLLAMA_BUILD_SERVER=ON -DBUILD_SHARED_LIBS=ON)	2m 47s
windows-latest-cmake-cublas (11.7.1, cublas)	6m 57s
windows-latest-cmake (avx, -DLLAMA_NATIVE=OFF -DLLAMA_BUILD_SERVER=ON -DLLAMA_AVX2=OFF -DBUILD_SH...	2m 36s
windows-latest-cmake (avx512, -DLLAMA_NATIVE=OFF -DLLAMA_BUILD_SERVER=ON -DLLAMA_AVX512=ON -DBUIL...	4m 50s
windows-latest-cmake (clblast, -DLLAMA_NATIVE=OFF -DLLAMA_BUILD_SERVER=ON -DLLAMA_CLBLAST=ON -DBU...	1m 56s
windows-latest-cmake (openblas, -DLLAMA_NATIVE=OFF -DLLAMA_BUILD_SERVER=ON -DLLAMA_BLAS=ON -DBUIL...	2m 56s
release	0s
	1h 13m 18s

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