Use args setting for run option in trigger

lib/vagrant/plugin/v2/trigger.rb

@@ -169,9 +169,13 @@ module Vagrant
             cmd = File.expand_path(config.path, @env.root_path)
             FileUtils.chmod("+x", cmd)
 
+            cmd << " #{config.args.join(' ' )}" if config.args
+
             if Vagrant::Util::Platform.windows?
               powershell_exe = Vagrant::Util::PowerShell.executable
               cmd = Shellwords.split("#{powershell_exe} #{config.powershell_args} #{cmd}")
+            else
+              cmd = Shellwords.split(cmd)
             end
 
             @machine.ui.detail(I18n.t("vagrant.trigger.run.script", path: config.path))

website/source/docs/triggers/configuration.html.md

@@ -30,6 +30,10 @@ Can be any valid Vagrant command. It also accepts a special value `:all` which w
 
 * `run_remote` (hash) - A collection of settings to run a inline or remote script with on the guest. These settings correspond to the [shell provosioner](/docs/provisioning/shell.html).
 
-* `run` (hash) - A collection of settings to run a inline or remote script with on the host. These settings correspond to the [shell provosioner](/docs/provisioning/shell.html).
+* `run` (hash) - A collection of settings to run a inline or remote script with on the host. These settings correspond to the [shell provosioner](/docs/provisioning/shell.html). However, at the moment the only settings `run` takes advantage of are:
+  + `args`
+  + `inline`
+  + `path`
+  + `powershell_args`
 
 * `warn` (string) - A warning message that will be printed at the beginning of a trigger.