Add some print statement to debug travis failures

Author: joonty

rubylib/vdebug.rb

@@ -40,9 +40,11 @@ def running?
   end
 
   def connected?
-     vim.command(
+     is_connected = vim.command(
        "python print debugger.runner.is_alive()"
-     ) == "True"
+     )
+     puts "Connected? #{is_connected.inspect}"
+     is_connected == "True"
   end
 
   def watch_window_content