Replace pre-go1.11 vendoring with a go1.11 module.

[brb-g]

No description provided.

[fvoznika]

Please wait for Lantao to approve too.

[Random-Liu]

Hm, after this change, how is this expected to be built?

go build doesn't work without the vendors. @brb-g

[brb-g]

I'm fixing up the travis build now -- I think it's broken because the Travis config specifies go 1.11 but the go.mod file specifies go 1.12. On my machine, make looks like:

brb@brb-gdesktop:~/gvisor-containerd-shim $ make
CGO_ENABLED=0 go build  -o bin/gvisor-containerd-shim   ./cmd/gvisor-containerd-shim
go: finding github.com/containerd/ttrpc v0.0.0-20190411181408-699c4e40d1e7
go: finding github.com/containerd/cri v0.0.0-20190308093238-8a0bd84b9a4c
go: finding github.com/golang/protobuf v1.1.0
go: finding github.com/docker/go-units v0.3.1
go: finding github.com/godbus/dbus v0.0.0-20151105175453-c7fdd8b5cd55
go: finding github.com/Microsoft/go-winio v0.4.14
go: finding github.com/containerd/continuity v0.0.0-20190815185530-f2a389ac0a02
go: finding github.com/coreos/go-systemd v0.0.0-20161114122254-48702e0da86b
go: finding github.com/containerd/go-runc v0.0.0-20180907222934-5a6d9f37cfa3
go: finding golang.org/x/net v0.0.0-20170716174642-b3756b4b77d7
go: finding github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd
go: finding github.com/containerd/console v0.0.0-20180822173158-c12b1e7919c1
go: finding github.com/containerd/containerd v0.0.0-20190510190154-d0319ec44af6
go: finding github.com/opencontainers/runtime-spec v0.0.0-20180909173843-eba862dc2470
go: finding github.com/containerd/cgroups v0.0.0-20190328223300-4994991857f9
go: finding google.golang.org/grpc v1.12.0
go: finding github.com/Microsoft/hcsshim v0.8.6
go: finding github.com/google/go-cmp v0.3.1
go: finding github.com/opencontainers/runc v1.0.0-rc8
go: finding github.com/gogo/protobuf v1.0.0
go: finding github.com/opencontainers/go-digest v0.0.0-20180430190053-c9281466c8b2
go: finding github.com/pkg/errors v0.8.1
go: finding gotest.tools v2.2.0+incompatible
go: finding golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b
go: finding github.com/sirupsen/logrus v1.4.1
go: finding github.com/containerd/fifo v0.0.0-20180307165137-3d5202aec260
go: finding google.golang.org/genproto v0.0.0-20170523043604-d80a6e20e776
go: finding golang.org/x/sync v0.0.0-20190423024810-112230192c58
go: finding github.com/BurntSushi/toml v0.3.0
go: finding golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33
go: finding github.com/stretchr/objx v0.1.1
go: finding github.com/konsorten/go-windows-terminal-sequences v1.0.1
go: finding github.com/stretchr/testify v1.2.2
go: finding github.com/davecgh/go-spew v1.1.1
go: finding github.com/pmezard/go-difflib v1.0.0
CGO_ENABLED=0 go build  -o bin/containerd-shim-runsc-v1   ./cmd/containerd-shim-runsc-v1
brb@brb-gdesktop:~/gvisor-containerd-shim $ ls bin/gvisor-containerd-shim 
bin/gvisor-containerd-shim

See https://github.com/golang/go/wiki/Modules.

[Random-Liu]

@brb-g Sounds good.

Fixing build and good to go. :)

[ianlewis]

@brb-g I think you need to add GO111MODULE=on to the env because travis puts the source under the GOPATH. If source is under GOPATH then go will not download dependencies when running 'go build'

[ianlewis]

LGTM