Merge pull request #6363 from hashicorp/fix_6358

sh -c to execute command to accomodate communicator change

builder/amazon/chroot/run_local_commands.go

@@ -22,7 +22,7 @@ func RunLocalCommands(commands []string, wrappedCommand CommandWrapper, ctx inte
 
 		ui.Say(fmt.Sprintf("Executing command: %s", command))
 		comm := &sl.Communicator{
-			ExecuteCommand: []string{command},
+			ExecuteCommand: []string{"sh", "-c", command},
 		}
 		cmd := &packer.RemoteCmd{Command: command}
 		if err := cmd.StartWithUi(comm, ui); err != nil {