hash anchor (#) parameter in the test URL doesn't work

[takahirox]

webgfx-tests adds test parameter as get query (like '?key1=value1&key2=value2') to the test URL. But if test URL includes hash anchor (#) parameter, the URL will be wrong.

For example, http://foo.com#bar will be like http://foo.com#bar?testparam1=value1&testparam2=value2. But hash anchor parameter needs to be after get query like http://foo.com?testparam1=value1&testparam2=value2#bar.