2014-07-28  Sharath Kamath  <s.kamath@samsung.com>

        New Async test cases Fail in webkit-webcl

        Fixed #537

        Reviewed by Antonio.

        Newly added test cases conformance test suite with async build option fails in webkit-webcl.
        Throws a exception in Console and timeout occurs.

        This is happening as callback is called before the program is built completely.

        * Modules/webcl/WebCLProgram.cpp:
        (WebCore::WebCLProgram::build):
        * Modules/webcl/WebCLProgram.h:
        (WebCore::WebCLProgram::callEvent):