hack to download tap test from emscripten builds

emscripten-ags-hack.txt

filePath = '/home/web_user/saved_games/ags3-auto-test/agstest.tap'
fileContent = FS.readFile(filePath, { encoding: 'binary' })
blob1 = new Blob([fileContent], { type: 'text/plain' });
downloadLink = document.createElement('a');
downloadLink.href = URL.createObjectURL(blob1);
downloadLink.download = 'agstest.tap';
document.body.appendChild(downloadLink);
downloadLink.click();