infrakit: Move the hyperkit instance plugin into the source directory

- The tools directory ideally should not contain source code
- Removes double vendoring of packagages
- Makes it easer to hook the build into the top-level Makefile

Eventually, the plugin should be moved to the infrakit repo.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

vendor/github.com/Sirupsen/logrus/terminal_windows.go

@@ -0,0 +1,33 @@
+// Based on ssh/terminal:
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build windows,!appengine
+
+package logrus
+
+import (
+	"io"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+var kernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+var (
+	procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
+)
+
+// IsTerminal returns true if stderr's file descriptor is a terminal.
+func IsTerminal(f io.Writer) bool {
+	switch v := f.(type) {
+	case *os.File:
+		var st uint32
+		r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(v.Fd()), uintptr(unsafe.Pointer(&st)), 0)
+		return r != 0 && e == 0
+	default:
+		return false
+	}
+}