remove hard coded pipe name

Author: lilou1337

modules/exploits/windows/local/lenovo_systemupdate.rb

@@ -88,9 +88,9 @@ def write_named_pipe(pipe, command)
     handle = r['return']
 
     if handle == invalid_handle_value
-      fail_with(Failure::NoTarget, "\\\\.\\pipe\\SUPipeServer named pipe not found")
+      fail_with(Failure::NoTarget, "#{pipe} named pipe not found")
     else
-      vprint_good("Opended \\\\.\\pipe\\SUPipeServer! Proceeding...")
+      vprint_good("Opended #{pipe}! Proceeding...")
     end
 
     # First, write the string length as Int32 value