[ALOY-1112] Styles TSS: Support spaces in comma-separated lists of targets in the platform attribute

For https://jira.appcelerator.org/browse/ALOY-1112
Rather than declaring a variable here, it would be more efficient to simply chain the method calls, like this:

```
_.each(match[3].replace(/\s*,\s*/g, ',').split(/\s+/), function(query) {
```