Set `--fatal-warning` on assembler #113

Job	Run time
docker	1m 12s
thirdparty-tests (test_perl)	10m 27s
thirdparty-tests (test_cello)	37s
thirdparty-tests (test_curl)	9m 1s
thirdparty-tests (test_doom)	14s
thirdparty-tests (test_git)	18m 18s
thirdparty-tests (test_libpng)	2m 20s
thirdparty-tests (test_libuev)	39s
thirdparty-tests (test_lua)	38s
thirdparty-tests (test_metalang99)	43s
thirdparty-tests (test_oniguruma_jq)	56s
thirdparty-tests (test_openssh)	4m 52s
thirdparty-tests (test_openssl)	16m 44s
thirdparty-tests (test_php)	6m 33s
thirdparty-tests (test_postgres)	4m 6s
thirdparty-tests (test_python)	26m 17s
thirdparty-tests (test_qbe_hare)	25s
thirdparty-tests (test_sqlite)	3m 24s
thirdparty-tests (test_tinycc)	30s
thirdparty-tests (test_toxcore)	4m 40s
thirdparty-tests (test_toybox)	52s
thirdparty-tests (test_vim)	2m 1s
thirdparty-tests (test_zlib)	15s
thirdparty-tests (test_zstd)	1m 41s
thirdparty-tests (build_gcc)	8m 53s
thirdparty-tests (build_musl)	1m 22s
thirdparty-tests (build_nano)	1m 0s
thirdparty-tests (build_sdl)	1m 35s
thirdparty-tests (build_zig)	8m 47s
	2h 19m 2s

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