Fix the build on Illumos.

[sean-]

Update github.com/docker/docker/pkg/system.

The only actual fix requird is vendor/github.com/docker/docker/pkg/system/meminfo_solaris.go but I updated the entire package since it was chalk full of portability fixes.

Without this fix it is not possible to build consul on Illumos:

# github.com/hashicorp/consul/vendor/github.com/docker/docker/pkg/system
vendor/github.com/docker/docker/pkg/system/meminfo_solaris.go: In function 'allocSwaptable':
vendor/github.com/docker/docker/pkg/system/meminfo_solaris.go:22:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
 // for (int i = 0; i < num; i++,swapent++) {
  ^
vendor/github.com/docker/docker/pkg/system/meminfo_solaris.go:22:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
vendor/github.com/docker/docker/pkg/system/meminfo_solaris.go: In function 'freeSwaptable':
vendor/github.com/docker/docker/pkg/system/meminfo_solaris.go:30:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
 // for (int i = 0; i < st->swt_n; i++,swapent++) {
  ^

[sean-]

Test failures appear to be unrelated to this change.

[slackpad]

Hmm this looks like it broke the Windows build:

2 errors occurred:
--> windows/amd64 error: exit status 1
Stderr: vendor/github.com/docker/docker/pkg/system/filesys_windows.go:16:2: cannot find package "github.com/Microsoft/go-winio" in any of:
        /gopath/src/github.com/hashicorp/consul/vendor/github.com/Microsoft/go-winio (vendor tree)
        /goroot/src/github.com/Microsoft/go-winio (from $GOROOT)
        /gopath/src/github.com/Microsoft/go-winio (from $GOPATH)
vendor/github.com/docker/docker/pkg/system/events_windows.go:10:2: cannot find package "golang.org/x/sys/windows" in any of:
        /gopath/src/github.com/hashicorp/consul/vendor/golang.org/x/sys/windows (vendor tree)
        /goroot/src/golang.org/x/sys/windows (from $GOROOT)
        /gopath/src/golang.org/x/sys/windows (from $GOPATH)

--> windows/386 error: exit status 1
Stderr: vendor/github.com/docker/docker/pkg/system/filesys_windows.go:16:2: cannot find package "github.com/Microsoft/go-winio" in any of:
        /gopath/src/github.com/hashicorp/consul/vendor/github.com/Microsoft/go-winio (vendor tree)
        /goroot/src/github.com/Microsoft/go-winio (from $GOROOT)
        /gopath/src/github.com/Microsoft/go-winio (from $GOPATH)
vendor/github.com/docker/docker/pkg/system/events_windows.go:10:2: cannot find package "golang.org/x/sys/windows" in any of:
        /gopath/src/github.com/hashicorp/consul/vendor/golang.org/x/sys/windows (vendor tree)
        /goroot/src/golang.org/x/sys/windows (from $GOROOT)
        /gopath/src/golang.org/x/sys/windows (from $GOPATH)

[slackpad]

Testing now - if that works I'll tee up a PR to add those.

[slackpad]

I went a few layers deep and it looks like we need to add github.com/Microsoft and update golang.org/x/sys/windows, but then other parts of Docker fail:

2 errors occurred:
--> windows/amd64 error: exit status 2
Stderr: # github.com/hashicorp/consul/vendor/github.com/docker/docker/pkg/archive
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:12: oldStat.ModTime undefined (type *system.StatT has no field or method ModTime)
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:12: newStat.ModTime undefined (type *system.StatT has no field or method ModTime)
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:14: oldStat.IsDir undefined (type *system.StatT has no field or method IsDir)
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:21: info.stat.IsDir undefined (type *system.StatT has no field or method IsDir)

--> windows/386 error: exit status 2
Stderr: # github.com/hashicorp/consul/vendor/github.com/docker/docker/pkg/archive
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:12: oldStat.ModTime undefined (type *system.StatT has no field or method ModTime)
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:12: newStat.ModTime undefined (type *system.StatT has no field or method ModTime)
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:14: oldStat.IsDir undefined (type *system.StatT has no field or method IsDir)
vendor/github.com/docker/docker/pkg/archive/changes_windows.go:21: info.stat.IsDir undefined (type *system.StatT has no field or method IsDir)

Since we are about to cut a release I don't want to update more deps right now. I'm going to revert this for 0.8.2, and then we can update all of Docker for the next release cycle, which will also re-up the deps from the PR.