Add vendoring to containerd master

Initial vendor list validated with empty $GOPATH
and only master checked out; followed by `make`
and verified that all binaries build properly.
Updates require github.com/LK4D4/vndr tool.

Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>

vendor/github.com/nats-io/gnatsd/server/signal.go

@@ -0,0 +1,34 @@
+// +build !windows
+// Copyright 2012-2016 Apcera Inc. All rights reserved.
+
+package server
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+// Signal Handling
+func (s *Server) handleSignals() {
+	if s.opts.NoSigs {
+		return
+	}
+	c := make(chan os.Signal, 1)
+
+	signal.Notify(c, syscall.SIGINT, syscall.SIGUSR1)
+
+	go func() {
+		for sig := range c {
+			Debugf("Trapped %q signal", sig)
+			switch sig {
+			case syscall.SIGINT:
+				Noticef("Server Exiting..")
+				os.Exit(0)
+			case syscall.SIGUSR1:
+				// File log re-open for rotating file logs.
+				s.ReOpenLogFile()
+			}
+		}
+	}()
+}