Windows: Archive package changes for Windows daemon

Signed-off-by: John Howard <jhoward@microsoft.com>

archive/changes_unix.go

@@ -0,0 +1,27 @@
+// +build !windows
+
+package archive
+
+import (
+	"syscall"
+
+	"github.com/docker/docker/pkg/system"
+)
+
+func statDifferent(oldStat *system.Stat_t, newStat *system.Stat_t) bool {
+	// Don't look at size for dirs, its not a good measure of change
+	if oldStat.Mode() != newStat.Mode() ||
+		oldStat.Uid() != newStat.Uid() ||
+		oldStat.Gid() != newStat.Gid() ||
+		oldStat.Rdev() != newStat.Rdev() ||
+		// Don't look at size for dirs, its not a good measure of change
+		(oldStat.Mode()&syscall.S_IFDIR != syscall.S_IFDIR &&
+			(!sameFsTimeSpec(oldStat.Mtim(), newStat.Mtim()) || (oldStat.Size() != newStat.Size()))) {
+		return true
+	}
+	return false
+}
+
+func (info *FileInfo) isDir() bool {
+	return info.parent == nil || info.stat.Mode()&syscall.S_IFDIR != 0
+}