synced_folders/rsync: fix oddness on Windows

CHANGELOG.md

@@ -57,6 +57,7 @@ BUG FIXES:
 
   - core: Adding a box from a network share on Windows works again. [GH-3279]
   - commands/rsync-auto: Interrupt exits properly. [GH-3552]
+  - commands/rsync-auto: Run properly on Windows. [GH-3547]
   - providers/virtualbox: VirtalBox detection works properly again on
       Windows when the `VBOX_INSTALL_PATH` has multiple elements. [GH-3549]
   - provisioners/salt: Always copy keys and configs on provision. [GH-3536]

plugins/synced_folders/rsync/command/rsync_auto.rb

@@ -2,8 +2,6 @@ require "log4r"
 require 'optparse'
 require "thread"
 
-require "listen"
-
 require "vagrant/action/builtin/mixin_synced_folders"
 require "vagrant/util/busy"
 require "vagrant/util/platform"
@@ -13,9 +11,10 @@ require_relative "../helper"
 # This is to avoid a bug in nio 1.0.0. Remove around nio 1.0.1
 if Vagrant::Util::Platform.windows?
   ENV["NIO4R_PURE"] = "1"
-  require "listen"
 end
 
+require "listen"
+
 module VagrantPlugins
   module SyncedFolderRSync
     module Command