message: Fix test with empty kit file on windows
  The windows version will always scan visual studio compilers.
  This needs some time.
diff: @@ -189,15 +189,16 @@ suite('Kits scan test', async () => {
  expect(nonVSKits.length).to.be.eq(0);
  }).timeout(10000);
  - // Fails because PATH is tried to split but a empty path is not splitable
  test('check empty kit file', async () => {
  + // mingwSearchDirs is cleared by setup method
  process.env.PATH = '';
  await km.initialize();
  - const newKitFileExists = await fs.exists(path_rescan_kit);
  - expect(newKitFileExists).to.be.true;
  - });
  + const kitFile = await readValidKitFile(path_rescan_kit);
  + const nonVSKits = kitFile.filter(item => item.visualStudio == null);
  + expect(nonVSKits.length).to.be.eq(0);
  + }).timeout(10000);
  test('check fake compilers in kit file', async () => {
  process.env['PATH'] = getTestRootFilePath('fakebin');
  