2014-01-23 Sharath Kamath <s.kamath@samsung.com>
        Memory Initialization is Missing

        Issue #426

        Reviewed by Antonio.

        Passing a empty initialised ArrayBuffer when the
        user does not send a initializer array.

        Eventhough slow will ensure memory in WebCLBuffer/WebCLImage
        are initialzed to 0.

        Conformance Test for initisation test under security folder.

        * Modules/webcl/WebCLBuffer.cpp:
        (WebCore::WebCLBuffer::create):
        * Modules/webcl/WebCLImage.cpp:
        (WebCore::WebCLImage::create):
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