Pass multiple parameters to makensis

[gentoo90]

This will allow to build project with adiitional parameters. example.sublime-project:

{
...
    "build_systems":
    [
        {
            "name": "example_nsis",
...
            "cmd": ["$packages/NSIS/nsis_build.bat", "u", "/DFOOBAR", "$project_path/example.nsi"]
...
        }
    ]
}