gost implementation #12

Job	Run time
check-assets	4s
build (windows, 386)	1m 28s
build (openbsd, 386)	1m 25s
build (openbsd, amd64)	1m 28s
build (linux, amd64)	1m 29s
build (windows, amd64)	1m 31s
build (freebsd, amd64)	1m 33s
build (linux, 386)	1m 32s
build (darwin, arm64)	1m 30s
build (linux, arm, 7)	1m 21s
build (darwin, amd64)	1m 30s
build (freebsd, 386)	1m 28s
build (linux, arm, 6)	1m 26s
build (linux, arm, 5)	1m 20s
build (android, amd64, android-amd64)	1m 47s
build (windows, arm64)	1m 22s
build (linux, ppc64le)	1m 33s
build (android, arm64)	1m 55s
build (linux, riscv64)	1m 28s
build (linux, mipsle)	2m 25s
build (linux, arm64)	1m 25s
build (linux, mips64)	1m 29s
build (windows, arm, 7)	1m 24s
build (freebsd, arm64)	1m 34s
build (linux, mips64le)	1m 29s
build (linux, mips)	2m 33s
build (openbsd, arm, 7)	1m 33s
build (linux, loong64)	1m 30s
build (linux, s390x)	1m 24s
build (linux, ppc64)	1m 21s
build (openbsd, arm64)	1m 32s
build (freebsd, arm, 7)	1m 25s
	48m 14s

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