Update webcl-test-event to use WebCLProxy

2013-04-26  Alexandre Rocha  <a.rocha@samsung.com>

        Use of events was implemented on WCLCommand::enqueueNDRangeKernel
        method. Events arent working with this build, so the code was not
        tested properly, but breaks nothing and wil be commited.

        The event-test was modified to use WebCLProxy.

        Reviewed by NOBODY (OOPS!).

        * webcl/resources/logger.js:
        * webcl/resources/webcl-proxy.js:
        * webcl/tests/webcl-test-event.html: