Merge pull request #1338 from iAsuma/contrib #361

Job	Run time
Build (linux, amd64)	39s
Build (linux, 386)	42s
Build (freebsd, amd64)	31s
Build (freebsd, 386)	48s
Build (openbsd, amd64)	35s
Build (openbsd, 386)	35s
Build (dragonfly, amd64)	35s
Build (windows, amd64)	31s
Build (windows, 386)	37s
Build (darwin, amd64)	38s
Build (linux, arm, 5)	31s
Build (linux, arm, 6)	37s
Build (linux, arm, 7)	35s
Build (linux, arm64)	32s
Build (linux, mips, softfloat)	34s
Build (linux, mips, hardfloat)	29s
Build (linux, mipsle, softfloat)	35s
Build (linux, mipsle, hardfloat)	40s
Build (linux, mips64)	32s
Build (linux, mips64le)	30s
Build (linux, ppc64)	32s
Build (linux, ppc64le)	29s
Build (linux, s390x)	37s
Build (windows, arm)	37s
Build (android, arm64)	42s
Build (darwin, arm64)	36s
Build (freebsd, arm64)	30s
	15m 49s

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