Using %none% for 64-bit suffix breaks debugging

[govert]

The launchsettings.json gets the %none% string when the build task sets up the debugging.

{
  "profiles": {
    "Excel": {
      "commandName": "Executable",
      "executablePath": "C:\\Program Files\\Microsoft Office\\root\\Office16\\EXCEL.EXE",
      "commandLineArgs": "AddinWithSettings-AddIn%none%.xll"
    }
  }