Using autoWatch with a **/* glob doesn't update the reports

### Expected behavior

autoWatch should work and report correct results with glob matchers of `src/app/**/*.js`
### Actual behavior

Reports are not updating to the correct result in autoWatch when using a matcher like `src/app/**/*.js`
### Enviroment Details
- Karma version (output of `karma --version`):
1.1.0
- Relevant part of your `karma.config.js` file
files
### Steps to reproduce the behaviour

I've prepared an example project at -
https://github.com/shairez/karma-autowatch-problem-example
- Before going through the steps below, **clone the project**
#### Here are the steps:
1. `karma start`
2. Verify that you see the `Executed 1 of 1 SUCCESS` message
3. Go to `registration.component.spec.js`
4. On line 25 change `ctrl.createAccount()` to `ctrl.createAccount2()`
5. You should see a failing test message in the karma report, but you see the same `SUCCESS` message from before
## It is solved when you change the glob matcher

I managed to find out that it's got to do with the **glob matcher** in the files configuration in `karma.conf.js`.
1. Go to `karma.conf.js`,
2. Comment line 12 where it says `'src/app/**/*.js'`
3. Uncomment line 13 where it says `'src/app/**/*.{component,service}.js'`
4. You should now see the autoWatch works correctly
## Bottom line

Something with `'src/app/**/*.js'` breaks the autoWatch reporting behavior