Added debugging before script

[the-redback]

Fixes #96

{
  "template": [
    {
      "alias": "cpp",
      "lang": "54",
      "path": "...",
      "suffix": [
        "cpp"
      ],
      "before_script": "g++ $%full%$ -o $%file%$.o -std=c++17",
      "debugging_before_script": "g++ $%full%$ -o $%file%$.o -std=c++17 -Dlocal_pc",
      "script": "./$%file%$.o",
      "after_script": ""
    }
  ],
 }
}