Revert "go.mod, go.sum: bump golang.org/x/sys from 20170803 to 20190102"

This reverts commit e42f746.

This bump fixed a failure for freebsd_arm64, but introduced a failure
for darwin_arm64.

Author: ee7

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/spf13/viper v0.0.0-20180507071007-15738813a09d
 	github.com/stretchr/testify v1.1.4
 	golang.org/x/net v0.0.0-20170726083632-f5079bd7f6f7
-	golang.org/x/sys v0.0.0-20190102155601-82a175fd1598
+	golang.org/x/sys v0.0.0-20170803140359-d8f5ea21b929
 	golang.org/x/text v0.0.0-20170730040918-3bd178b88a81
 	gopkg.in/yaml.v2 v2.0.0-20170721122051-25c4ec802a7d
 )

go.sum

@@ -38,8 +38,6 @@ golang.org/x/net v0.0.0-20170726083632-f5079bd7f6f7 h1:1Pw+ZX4dmGORIwGkTwnUr7RFu
 golang.org/x/net v0.0.0-20170726083632-f5079bd7f6f7/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/sys v0.0.0-20170803140359-d8f5ea21b929 h1:M4VPQYSW/nB4Bcg1XMD4yW2sprnwerD3Kb6apRphtZw=
 golang.org/x/sys v0.0.0-20170803140359-d8f5ea21b929/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190102155601-82a175fd1598 h1:S8GOgffXV1X3fpVG442QRfWOt0iFl79eHJ7OPt725bo=
-golang.org/x/sys v0.0.0-20190102155601-82a175fd1598/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/text v0.0.0-20170730040918-3bd178b88a81 h1:7aXI3TQ9sZ4JdDoIDGjxL6G2mQxlsPy9dySnJaL6Bdk=
 golang.org/x/text v0.0.0-20170730040918-3bd178b88a81/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 gopkg.in/yaml.v2 v2.0.0-20170721122051-25c4ec802a7d h1:2DX7x6HUDGZUyuEDAhUsQQNqkb1zvDyKTjVoTdzaEzo=