migrate vendor to golang/dep

[unkaktus]

Imprortant notice: this PR updates vendor of following packages:

• github.com/docker/docker
• golang.org/x/sys
• google.golang.org/api

Probably removing of obsolete godep files should be here as well.

[dgageot]

😍

[dgageot]

@nogoegst Please ping me when it's ready to review

[GordonTheTurtle]

Please sign your commits following these rules:
https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work
The easiest way to do this is to amend the last commit:

$ git clone -b "dep" git@github.com:nogoegst/machine.git somewhere
$ cd somewhere
$ git rebase -i HEAD~842354611080
editor opens
change each 'pick' to 'edit'
save the file and quit
$ git commit --amend -s --no-edit
$ git rebase --continue # and repeat the amend for each commit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.

[unkaktus]

@dgageot, I think it is ready for review. 😉

[dgageot]

• make build works
• USE_CONTAINER=true make build works

[dgageot]

@nogoegst Can you update those instructions too? https://github.com/docker/machine/blob/master/CONTRIBUTING.md#restore-update-and-save-dependencies

[dgageot]

@nogoegst Forget about it. It's just me being drunk

[dgageot]

Minor typos

[dgageot]

s/dependecies/dependencies/

[dgageot]

s/on/for/

[dgageot]

s/builds/build/

[unkaktus]

btw there are multiple options to build I guess. That's why there was 'builds'.

[dgageot]

@nogoegst Please fix the typos and then I think we are good to go \o/

[unkaktus]

@dgageot fixed, thanks!

[dgageot]

LGTM

[dgageot]

@vdemeester or @shin- would you have a moment to review?

[vdemeester]

SGTM 🐸

[dgageot]

@vdemeester Thanks!