Add Command Line Arguments to Exported File

[dimeko]

Hello,

This pull request enhances the exported file by including the command line arguments of the executed command.
This may provides users with clear visibility into the specific command that generated the raw output. User will be able to make sure an output file has been generated with, for example -l 5 and not -l 1.

'"{}"'.format(arg) if ' ' in arg else arg is added in order to keep " " in the outputted string.

File export with command line arguments:
json:

{
  "cmd": "-d example.com -s -f ../example.com -l 1 -b all",
  "hosts": [
    ".example.com",
   ]
}

xml:

<?xml version="1.0" encoding="UTF-8"?>
   <theHarvester>
      <cmd>-d example.com -s -f ../example.com -l 1 -b all</cmd>
      <email>email@example.com</email>
      ...
   </theHarvester>