WPT covers standards in both W3C and WHATWG, as such it would be
strange to make this disparity explicit in our file names
(e.g. when testing standards that are solely in W3C, like
performance-timeline). Remove the reference to WHATWG will
also make the file names shorter.

This patch:

- Support wildcards(*) in WPT runner name matching (needed by e.g.
  encoding where all the tests requires i18n support in the build)
- Print failure reasons when encountering an expected failure
- Fix a bug in copyGlobalsFromObject (previously it copies
  properties from `global` instead of the given `obj`)

Previously an expected failure is printed as

```
[EXPECTED_FAILURE] response.formData() with input: %61+%4d%4D=
```

Now it is printed as

```
[EXPECTED_FAILURE] response.formData() with input: %61+%4d%4D=
missing Request and Response
```