Builds via AppBuilder Need to Include EXE Extension

[TheTalisman]

When using the described AppBuilder to generate builds for Windows the name passed to BuildPipeline needs to include the extension '.exe' for users to be able to run the generated build.

For Example, the StartBuildProcess() method in the SettingsWindow class can be changed as follows:

private void StartBuildProcess() {
     Builder.CreateBuildFolder();
   // We iterate over the toggle values to check what to build
     foreach(KeyValuePair<BuildTarget, string> entry in _targets) {
       if(GetPlatformToggleValue(entry.Key)) {
            if (entry.Key == BuildTarget.StandaloneWindows) {
                        Builder.Build(entry.Key, "build.exe");
            }
            else {
                        Builder.Build(entry.Key, "build");
            }
        }
     }
     EditorUtility.DisplayDialog ("AppBuilder", "Build process has finished!", "Ok");
}