servo/servo — pull request #4063 by mttr (2014-11-21 22:03:35+00:00)
Title: Run a single WPT test from a relative path

Fixes #4055

This PR allows `./mach test-wpt` to be run (from /path/to/servo) with a single relative path to some wpt test.

For example:
```
./mach test-wpt tests/wpt/web-platform-tests/dom/sometest.html
```
The argument `tests/wpt/web-platform-tests/dom/sometest.html` is passed on as `--include dom/sometest.html`.