Ensure `apm test` works correctly for chocolatey-installed Atom on Windows

Fixes https://github.com/atom/chocolatey/issues/23 - @kevinsawicki

Example output:

```
c:\projects\go-plus>apm test
[2664:0713/213953:ERROR:gpu_info_collector_win.cc(102)] Can't retrieve a valid WinSAT assessment.
[2664:0713/213954:INFO:CONSOLE(0)] Application server failed { [Error: listen EADDRINUSE] code: 'EADDRINUSE', errno: 'EA
DDRINUSE', syscall: 'listen' }
[3748:0713/213954:INFO:renderer_main.cc(227)] Renderer process started
[2664:0713/213954:ERROR:cache_util_win.cc(20)] Unable to move the cache: 5
[2664:0713/213954:ERROR:cache_util.cc(104)] Unable to move cache folder C:\Users\vagrant\AppData\Roaming\Atom\GPUCache t
o C:\Users\vagrant\AppData\Roaming\Atom\old_GPUCache_000
[2664:0713/213954:ERROR:cache_creator.cc(115)] Unable to create cache
[2664:0713/213954:ERROR:shader_disk_cache.cc(580)] Shader Cache Creation failed: -2
warning: removing Breakpad handler out of order
...................................

Finished in 5.485 seconds
35 tests, 182 assertions, 0 failures, 0 skipped


Tests passed
```